The Access Expiration plugin is a plugin from Multinc that adds a level of access control for particularly sensitive posts. For each post or category, you can limit the number of views and the amount of time that an item remains viewable by each user after he or she first accesses the post. Unlike other plugins that expire posts for all users at the same time, this plugin keeps track of every user?s viewing history so that each gets equal access time.
You can also impose separate limits for unregistered users, who are all considered as one single user.
When used in combination with the other plugins in the <a href="https://wordpress.org/extend/plugins/social-privacy/">Social Privacy</a> set, this plugin is useful for limiting the chance that any authorized user accidentally or deliberately forwards a private post to an unauthorized user.
Because authorized users may have legitimate reasons for accessing a post beyond the allotted time, the plugin gives users the simple option of requesting an extension of their viewing privileges.

Access Expiration

For each post or category, you can limit the number of views and the amount…

Based on the 3rd-party Subscribe2, this plugin allows registered and unregistered users to be notified via email whenever there is a new post that they are permitted to access. Users can choose between different email contents and post categories.
This plugin is part of the <a href="https://wordpress.org/extend/plugins/social-privacy/">Social Privacy</a> set of plugins and it’s recommended that you install the entire set at one time to get complete control over access to your posts on your blog.
<h4>Differences between the original plugin and our plugin</h4>
The 3rd-party <a href="http://subscribe2.wordpress.com/plugin/" rel="nofollow ugc">Subscribe2</a> plugin allows registered and unregistered users to be notified via email whenever a new post is published, regardless of whether access is restricted. It allows users to subscribe to either full posts or excerpts of posts, to choose whether the format of full posts should be HTML or plain-text, and to select which categories they are interested in.
Our version of the plugin works with <a href="https://wordpress.org/extend/plugins/social-access-control/">Social Access Control</a> so that users receive emails only for posts or categories of posts that they are permitted to view. In addition, the administrator can choose from several email contents depending on whether the post is public or restricted: full post, excerpt, title only, or no email.

Subscribe2 for Social Privacy

Based on the 3rd-party Subscribe2, this plugin allows registered and unregistered users to be notified via email whenever there is a new post that the …

Access Expiration vs Subscribe2 for Social Privacy