diff --git a/app/soapbox/containers/soapbox.tsx b/app/soapbox/containers/soapbox.tsx
index b9603b3b1..d6c17db5f 100644
--- a/app/soapbox/containers/soapbox.tsx
+++ b/app/soapbox/containers/soapbox.tsx
@@ -96,7 +96,7 @@ const SoapboxMount = () => {
   const waitlisted = account && !account.source.get('approved', true);
   const needsOnboarding = useAppSelector(state => state.onboarding.needsOnboarding);
   const showOnboarding = account && !waitlisted && needsOnboarding;
-  const singleUserMode = soapboxConfig.singleUserMode && soapboxConfig.singleUserModeProfile;
+  const { redirectRootNoLogin } = soapboxConfig;
 
   const pepeEnabled = soapboxConfig.getIn(['extensions', 'pepe', 'enabled']) === true;
 
@@ -134,8 +134,8 @@ const SoapboxMount = () => {
         />
       )}
 
-      {!me && (singleUserMode
-        ? <Redirect exact from='/' to={`/${singleUserMode}`} />
+      {!me && (redirectRootNoLogin
+        ? <Redirect exact from='/' to={redirectRootNoLogin} />
         : <Route exact path='/' component={PublicLayout} />)}
 
       {!me && (
diff --git a/app/soapbox/features/soapbox-config/index.tsx b/app/soapbox/features/soapbox-config/index.tsx
index 8484863b6..761c34d59 100644
--- a/app/soapbox/features/soapbox-config/index.tsx
+++ b/app/soapbox/features/soapbox-config/index.tsx
@@ -47,10 +47,6 @@ const messages = defineMessages({
   authenticatedProfileLabel: { id: 'soapbox_config.authenticated_profile_label', defaultMessage: 'Profiles require authentication' },
   authenticatedProfileHint: { id: 'soapbox_config.authenticated_profile_hint', defaultMessage: 'Users must be logged-in to view replies and media on user profiles.' },
   displayCtaLabel: { id: 'soapbox_config.cta_label', defaultMessage: 'Display call to action panels if not authenticated' },
-  singleUserModeLabel: { id: 'soapbox_config.single_user_mode_label', defaultMessage: 'Single user mode' },
-  singleUserModeHint: { id: 'soapbox_config.single_user_mode_hint', defaultMessage: 'Front page will redirect to a given user profile.' },
-  singleUserModeProfileLabel: { id: 'soapbox_config.single_user_mode_profile_label', defaultMessage: 'Main user handle' },
-  singleUserModeProfileHint: { id: 'soapbox_config.single_user_mode_profile_hint', defaultMessage: '@handle' },
   mediaPreviewLabel: { id: 'soapbox_config.media_preview_label', defaultMessage: 'Prefer preview media for thumbnails' },
   mediaPreviewHint: { id: 'soapbox_config.media_preview_hint', defaultMessage: 'Some backends provide an optimized version of media for display in timelines. However, these preview images may be too small without additional configuration.' },
   feedInjectionLabel: { id: 'soapbox_config.feed_injection_label', defaultMessage: 'Feed injection' },
@@ -283,27 +279,6 @@ const SoapboxConfig: React.FC = () => {
               />
             </ListItem>
 
-            <ListItem
-              label={intl.formatMessage(messages.singleUserModeLabel)}
-              hint={intl.formatMessage(messages.singleUserModeHint)}
-            >
-              <Toggle
-                checked={soapbox.singleUserMode === true}
-                onChange={handleChange(['singleUserMode'], (e) => e.target.checked)}
-              />
-            </ListItem>
-
-            {soapbox.get('singleUserMode') && (
-              <ListItem label={intl.formatMessage(messages.singleUserModeProfileLabel)}>
-                <Input
-                  type='text'
-                  placeholder={intl.formatMessage(messages.singleUserModeProfileHint)}
-                  value={soapbox.singleUserModeProfile}
-                  onChange={handleChange(['singleUserModeProfile'], (e) => e.target.value)}
-                />
-              </ListItem>
-            )}
-
             <ListItem
               label={intl.formatMessage(messages.redirectRootNoLoginLabel)}
               hint={intl.formatMessage(messages.redirectRootNoLoginHint)}
diff --git a/app/soapbox/features/ui/components/__tests__/cta-banner.test.tsx b/app/soapbox/features/ui/components/__tests__/cta-banner.test.tsx
index dbda24b55..4ab6bdd4b 100644
--- a/app/soapbox/features/ui/components/__tests__/cta-banner.test.tsx
+++ b/app/soapbox/features/ui/components/__tests__/cta-banner.test.tsx
@@ -1,6 +1,7 @@
-import { Map as ImmutableMap } from 'immutable';
 import React from 'react';
 
+import { normalizeInstance } from 'soapbox/normalizers';
+
 import { render, screen } from '../../../../jest/test-helpers';
 import CtaBanner from '../cta-banner';
 
@@ -19,9 +20,9 @@ describe('<CtaBanner />', () => {
     });
   });
 
-  describe('with singleUserMode enabled', () => {
+  describe('with registrations closed', () => {
     it('renders empty', () => {
-      const store = { soapbox: ImmutableMap({ singleUserMode: true }) };
+      const store = { instance: normalizeInstance({ registrations: false }) };
 
       render(<CtaBanner />, undefined, store);
       expect(screen.queryAllByTestId('cta-banner')).toHaveLength(0);
diff --git a/app/soapbox/features/ui/components/cta-banner.tsx b/app/soapbox/features/ui/components/cta-banner.tsx
index 87860b318..5e06b207c 100644
--- a/app/soapbox/features/ui/components/cta-banner.tsx
+++ b/app/soapbox/features/ui/components/cta-banner.tsx
@@ -6,10 +6,10 @@ import { useAppSelector, useInstance, useSoapboxConfig } from 'soapbox/hooks';
 
 const CtaBanner = () => {
   const instance = useInstance();
-  const { displayCta, singleUserMode } = useSoapboxConfig();
+  const { displayCta } = useSoapboxConfig();
   const me = useAppSelector((state) => state.me);
 
-  if (me || !displayCta || singleUserMode) return null;
+  if (me || !displayCta || !instance.registrations) return null;
 
   return (
     <div data-testid='cta-banner' className='hidden lg:block'>
diff --git a/app/soapbox/features/ui/components/modals/unauthorized-modal.tsx b/app/soapbox/features/ui/components/modals/unauthorized-modal.tsx
index 9a7906e87..809abcbda 100644
--- a/app/soapbox/features/ui/components/modals/unauthorized-modal.tsx
+++ b/app/soapbox/features/ui/components/modals/unauthorized-modal.tsx
@@ -4,7 +4,7 @@ import { useHistory } from 'react-router-dom';
 
 import { remoteInteraction } from 'soapbox/actions/interactions';
 import { Button, Modal, Stack, Text } from 'soapbox/components/ui';
-import { useAppSelector, useAppDispatch, useFeatures, useSoapboxConfig, useInstance } from 'soapbox/hooks';
+import { useAppSelector, useAppDispatch, useFeatures, useInstance } from 'soapbox/hooks';
 import toast from 'soapbox/toast';
 
 const messages = defineMessages({
@@ -31,7 +31,6 @@ const UnauthorizedModal: React.FC<IUnauthorizedModal> = ({ action, onClose, acco
   const dispatch = useAppDispatch();
   const instance = useInstance();
 
-  const { singleUserMode } = useSoapboxConfig();
   const username = useAppSelector(state => state.accounts.get(accountId)?.display_name);
   const features = useFeatures();
 
@@ -98,7 +97,7 @@ const UnauthorizedModal: React.FC<IUnauthorizedModal> = ({ action, onClose, acco
       <Modal
         title={header}
         onClose={onClickClose}
-        confirmationAction={!singleUserMode ? onLogin : undefined}
+        confirmationAction={instance.registrations ? onLogin : undefined}
         confirmationText={<FormattedMessage id='account.login' defaultMessage='Log in' />}
         secondaryAction={onRegister}
         secondaryText={<FormattedMessage id='account.register' defaultMessage='Sign up' />}
@@ -122,7 +121,7 @@ const UnauthorizedModal: React.FC<IUnauthorizedModal> = ({ action, onClose, acco
               <FormattedMessage id='remote_interaction.divider' defaultMessage='or' />
             </Text>
           </div>
-          {!singleUserMode && (
+          {instance.registrations && (
             <Text size='lg' weight='medium'>
               <FormattedMessage id='unauthorized_modal.title' defaultMessage='Sign up for {site_title}' values={{ site_title: instance.title }} />
             </Text>
diff --git a/app/soapbox/features/ui/components/navbar.tsx b/app/soapbox/features/ui/components/navbar.tsx
index d9829afca..bbb357bfa 100644
--- a/app/soapbox/features/ui/components/navbar.tsx
+++ b/app/soapbox/features/ui/components/navbar.tsx
@@ -9,7 +9,7 @@ import { openSidebar } from 'soapbox/actions/sidebar';
 import SiteLogo from 'soapbox/components/site-logo';
 import { Avatar, Button, Form, HStack, IconButton, Input, Tooltip } from 'soapbox/components/ui';
 import Search from 'soapbox/features/compose/components/search';
-import { useAppDispatch, useOwnAccount, useSoapboxConfig } from 'soapbox/hooks';
+import { useAppDispatch, useInstance, useOwnAccount } from 'soapbox/hooks';
 
 import ProfileDropdown from './profile-dropdown';
 
@@ -29,8 +29,7 @@ const Navbar = () => {
   const node = useRef(null);
 
   const account = useOwnAccount();
-  const soapboxConfig = useSoapboxConfig();
-  const singleUserMode = soapboxConfig.get('singleUserMode');
+  const instance = useInstance();
 
   const [isLoading, setLoading] = useState<boolean>(false);
   const [username, setUsername] = useState<string>('');
@@ -151,7 +150,7 @@ const Navbar = () => {
                     <FormattedMessage id='account.login' defaultMessage='Log In' />
                   </Button>
 
-                  {!singleUserMode && (
+                  {!instance.registrations && (
                     <Button theme='primary' to='/signup' size='sm'>
                       <FormattedMessage id='account.register' defaultMessage='Sign up' />
                     </Button>
diff --git a/app/soapbox/features/ui/components/panels/sign-up-panel.tsx b/app/soapbox/features/ui/components/panels/sign-up-panel.tsx
index 318080770..117a8a8b9 100644
--- a/app/soapbox/features/ui/components/panels/sign-up-panel.tsx
+++ b/app/soapbox/features/ui/components/panels/sign-up-panel.tsx
@@ -2,14 +2,13 @@ import React from 'react';
 import { FormattedMessage } from 'react-intl';
 
 import { Button, Stack, Text } from 'soapbox/components/ui';
-import { useAppSelector, useInstance, useSoapboxConfig } from 'soapbox/hooks';
+import { useAppSelector, useInstance } from 'soapbox/hooks';
 
 const SignUpPanel = () => {
   const instance = useInstance();
-  const { singleUserMode } = useSoapboxConfig();
   const me = useAppSelector((state) => state.me);
 
-  if (me || singleUserMode) return null;
+  if (me || !instance.registrations) return null;
 
   return (
     <Stack space={2}>
diff --git a/app/soapbox/normalizers/soapbox/__tests__/soapbox-config.test.ts b/app/soapbox/normalizers/soapbox/__tests__/soapbox-config.test.ts
index 9b70eba36..5eccab870 100644
--- a/app/soapbox/normalizers/soapbox/__tests__/soapbox-config.test.ts
+++ b/app/soapbox/normalizers/soapbox/__tests__/soapbox-config.test.ts
@@ -34,4 +34,15 @@ describe('normalizeSoapboxConfig()', () => {
     expect(ImmutableRecord.isRecord(result.promoPanel.items.get(0))).toBe(true);
     expect(result.promoPanel.items.get(2)?.icon).toBe('question-circle');
   });
+
+  it('upgrades singleUserModeProfile to redirectRootNoLogin', () => {
+    expect(normalizeSoapboxConfig({ singleUserMode: true, singleUserModeProfile: 'alex' }).redirectRootNoLogin).toBe('/@alex');
+    expect(normalizeSoapboxConfig({ singleUserMode: false, singleUserModeProfile: 'alex' }).redirectRootNoLogin).toBe('');
+  });
+
+  it('normalizes redirectRootNoLogin', () => {
+    expect(normalizeSoapboxConfig({ redirectRootNoLogin: 'benis' }).redirectRootNoLogin).toBe('/benis');
+    expect(normalizeSoapboxConfig({ redirectRootNoLogin: '/benis' }).redirectRootNoLogin).toBe('/benis');
+    expect(normalizeSoapboxConfig({ redirectRootNoLogin: '/' }).redirectRootNoLogin).toBe('');
+  });
 });
diff --git a/app/soapbox/normalizers/soapbox/soapbox-config.ts b/app/soapbox/normalizers/soapbox/soapbox-config.ts
index e899e1e80..f2366bdf1 100644
--- a/app/soapbox/normalizers/soapbox/soapbox-config.ts
+++ b/app/soapbox/normalizers/soapbox/soapbox-config.ts
@@ -106,8 +106,6 @@ export const SoapboxConfigRecord = ImmutableRecord({
   }),
   aboutPages: ImmutableMap<string, ImmutableMap<string, unknown>>(),
   authenticatedProfile: true,
-  singleUserMode: false,
-  singleUserModeProfile: '',
   linkFooterMessage: '',
   links: ImmutableMap<string, string>(),
   displayCta: true,
@@ -115,7 +113,7 @@ export const SoapboxConfigRecord = ImmutableRecord({
   feedInjection: true,
   tileServer: '',
   tileServerAttribution: '',
-  redirectRootNoLogin: '/',
+  redirectRootNoLogin: '',
   /**
    * Whether to use the preview URL for media thumbnails.
    * On some platforms this can be too blurry without additional configuration.
@@ -198,6 +196,45 @@ const normalizeAdsAlgorithm = (soapboxConfig: SoapboxConfigMap): SoapboxConfigMa
   }
 };
 
+/** Single user mode is now managed by `redirectRootNoLogin`. */
+const upgradeSingleUserMode = (soapboxConfig: SoapboxConfigMap): SoapboxConfigMap => {
+  const singleUserMode = soapboxConfig.get('singleUserMode');
+  const singleUserModeProfile = soapboxConfig.get('singleUserModeProfile');
+  const redirectRootNoLogin = soapboxConfig.get('redirectRootNoLogin');
+
+  if (!redirectRootNoLogin && singleUserMode && singleUserModeProfile) {
+    return soapboxConfig
+      .set('redirectRootNoLogin', `/@${singleUserModeProfile}`)
+      .deleteAll(['singleUserMode', 'singleUserModeProfile']);
+  } else {
+    return soapboxConfig
+      .deleteAll(['singleUserMode', 'singleUserModeProfile']);
+  }
+};
+
+/** Ensure a valid path is used. */
+const normalizeRedirectRootNoLogin = (soapboxConfig: SoapboxConfigMap): SoapboxConfigMap => {
+  const redirectRootNoLogin = soapboxConfig.get('redirectRootNoLogin');
+
+  if (!redirectRootNoLogin) return soapboxConfig;
+
+  try {
+    // Basically just get the pathname with a leading slash.
+    const normalized = new URL(redirectRootNoLogin, 'a://').pathname;
+
+    if (normalized !== '/') {
+      return soapboxConfig.set('redirectRootNoLogin', normalized);
+    } else {
+      // Prevent infinite redirect(?)
+      return soapboxConfig.delete('redirectRootNoLogin');
+    }
+  } catch (e) {
+    console.error('You have configured an invalid redirect in Soapbox Config.');
+    console.error(e);
+    return soapboxConfig.delete('redirectRootNoLogin');
+  }
+};
+
 export const normalizeSoapboxConfig = (soapboxConfig: Record<string, any>) => {
   return SoapboxConfigRecord(
     ImmutableMap(fromJS(soapboxConfig)).withMutations(soapboxConfig => {
@@ -210,6 +247,8 @@ export const normalizeSoapboxConfig = (soapboxConfig: Record<string, any>) => {
       normalizeCryptoAddresses(soapboxConfig);
       normalizeAds(soapboxConfig);
       normalizeAdsAlgorithm(soapboxConfig);
+      upgradeSingleUserMode(soapboxConfig);
+      normalizeRedirectRootNoLogin(soapboxConfig);
     }),
   );
 };