Adult Earners has a good program Basically you collect addresses with simple email boxes. Every email address collected earns you $2.00 in advertising credit to be used on the adult PayPerClick listings on IntelligentWebs program. If that isnt enough the emails collected has sponser referal codes in them that way you get credited for the signup. The hardest thing you may have to do is signing up with 13 different sponsers unless you alrerady have a account with some of them.