Originally Posted by CIVMatt

I recall a while ago a nice plugin package to run your WP install as a member site. What this did was separate a post or gallery into two sections. A public displayed free image or whatever contact with a bottom link to see the rest of this set or again whatever you put in there. SUrfer clicks that and then checks them again the membership db and either allows them the rest of the post or refers them to join or etc.