curlybracket

This WordPress plugin restricts non-authenticated users to a number of pages to view. You can define how many pages an unauthenticated user may view. If the limit is reached, the user is redirected to the WordPress login page (default) or a page of your choice.
This plugin uses cookies, but not only. People can not just empty their cookies and start watching your page again. In this plugin i use a technique in which I combine a users’ IP address with the user agent of this particular user, and create a more or less unique hash out of these two informations. This hash is stored as a file in the wp-content/uploads directory.
A site administrator can choose to reinitialize all sessions and empty the hash files.
Furthermore, robots might be blocked. However, important bots like GoogleBot, BingBot and YahooBot are excluded from the restriction.
This technique might be problematic for users using Tor / TorBrowserBundle as lots of people share a same originating IP address and also the same user agent (check here https://panopticlick.eff.org/). I will certainly test this aspect a little better in a later version of this plugin.

Pageview content restriction

Restricts access to your Wordpress site after a certain number of pageviews.

taras.sych

This plugin is as simple as you expected! 
And it support latest WordPress Gutenberg editor now!
Mark the content you want to hide as restricted with just a checkbox – and it’s done!
In case anonymous user will try to get access to restricted page or post – it will be redirected to WordPress Login page first. 
Or you can specify the exact URL (internal or external) to redirect anonymous users to.
After successful authorization, user is redirected back to the requested page.
Also, it hides restricted posts from Archive and Categories pages, RSS feed and from Latest Comments/Posts widgets!

Anonymous Restricted Content

This is simple enough to use and accomplishes the task. You can protect attachments, which was key for me. Support was slow.

Does what it needs to

Simple but yet effective plugin to hide selected posts and pages from anonymous users.

Pageview content restriction vs Anonymous Restricted Content