Hype

Hype gives you all the tools you need to turn your site into an audience business. No need to redesign your site, learn to code, or hire a developer.
<h4>FOR COLLECTING SIGNUPS AND MANAGING NEWSLETTERS</h4>
Register users while you collect emails and phone numbers. 
Hype’s popups and landing pages can register users on your site in seconds (no password needed), helping you collect email addresses and phone numbers at scale.
Offer free and paid newsletters side by side. 
Easily offer any combination of free and paid newsletters.
Engagement data that matter. 
Transform your contact list into a sales funnel. Keep track of how often a user visits, when they last visited your site, and even what content categories they read the most.
Easy on-site integration. 
Use Hype’s pre-made templates, with high-converting, third-party sign-in buttons built-in. Or connect with your own email embed forms on site with just one line of code.
<h4>FOR SUBSCRIPTIONS AND MEMBERSHIPS</h4>
The easiest way to sell access to your content. 
Launch a subscription paywall or membership program in minutes with checkout flows that are sure to convert.
Manage members and leads in the same place. 
Hype is the only subscription and membership tool with a built-in CRM that helps you keep track of who’s paying and who’s about to pay.
Just want to collect donations? 
Hype is the easiest way to offer donations via Stripe directly on your site or via landing page. All with Hype’s CRM and signup tools built in.
Effortless setup. No coding required. 
Hype can be up and running on your site in minutes. And the Hype app makes setting up all types of models – from multiple pricing tiers, metered paywalls, ‘freemium’ access, and trials – a breeze.
<h4>INTEGRATIONS</h4>
Hype integrates directly with Stripe and various email service providers, including Mailchimp, ConvertKit, and ActiveCampaign. Hype also integrates with Zapier, enabling workflows with thousands of other services.

Intelligent popups and landing pages to fully manage email and phone number signups, newsletters, subscriptions, donations, and memberships.

itthinx

This plugin redirects 404’s caused by hits on pages that are protected by <a href="https://wordpress.org/plugins/groups/" rel="ugc">Groups</a>.
The redirection settings can be adjusted in Settings > Groups 404 :
Visits to protected pages can be redirected to:
<ul>
<li>a specific post, or</li>
<li>the WordPress login</li>
</ul>
The redirection can also be applied for restricted categories, tags and other taxonomy terms if <a href="https://www.itthinx.com/shop/groups-restrict-categories/" rel="nofollow ugc">Groups Restrict Categories</a> is used.
The redirect status code can be selected among:
<ul>
<li>Moved Permanently (301)</li>
<li>Found (302)</li>
<li>See other (303)</li>
<li>Temporary Redirect (307)</li>
</ul>

Groups 404 Redirect

I know this plugin hasn't been updated in a couple years, but IMHO Groups and its related plugins (like this one) are a hidden gem for WordPress sites. So many people jump to complicated membership plugins when they could do everything they need with Groups. This 404 redirect add-on works like a charm. I'm using it on the latest version of WP 5.x

Perfect.

Redirect 404's when a visitor tries to access a page protected by Groups.

Hype vs Groups 404 Redirect