Here's a tip:
Steer away from the $$/month type membership deal. That's so passe.
Develop your own, and start investing in technology that allows you to pay per view. Similar to peep shows or video on demand. Sell videos online for viewing for $2.00/pop. Have thousands of clips. Create commission structures with authors of those videos -- in exchange for them directing traffic to you.
Stuff like that. Similar to how music is currently being sold online. 99c/song.
I sure as hell ain' forking out $20/month on some stupid membershp thing. But i may want to pay one-time $2.00 to view some hot piece of ass staring at me. What's 2 bucks? For you -- those 2 bucks add-up.