Yes true ...
But many persons signing up for cash programs, like you said, are doing nothing....for my part, the traffic is coming from only 5 or 6 TGPs, I got some from social network, and .....that's all !
Like I said before, not in this post, many surfers are JUST looking the updates of the TGPs without signing in any websites.....with 12 pics or 3 vid, they got all they want
....even if you look at some mega websites,like Orgymax can have, you will see that they change their way to proceed....
They got an update page, then a preview of the updates on a page, then you go on the site list ...and THEN you can finally see samples ....just because the surfer have to stay a little more longer to see what he wants to see....