http://www.adultepass.com/ does something similar. Instead of paying webmasters, they just use it as an email collection/swap service.
You build your little members area & when you get a surfer to enter their email address & sign up, it keeps track of the addresses for you. Once inside, the members can hop around to the other sites...sort of like an AVS. But every time a member lands on your site, even if you didn't sign him up originally, you get his email address added to your list.
That might work for you if you're looking to collect addresses.