Wishlist Member plugin allows you to protect your content under membership levels and / or pay-per-post.
However, sometimes you may want to change a specific post/ page protection settings, for example: move it from level to level, from protected to unprotected, from unprotected to protected etc.
Some of the reasons why you may want to automatically change the protection settings of a specific content are:
Providing only members the privilege to access content before others by changing the content from protected to unprotected
Giving free members a sneak peek to your membership site’s content for a short period of time to make them want to upgrade to the full membership