One that works on all kind of sites (adult, mainstream(, I think its pretty cool so I created a small page for it.
Check out
this page I made, there are screencaps of payments made from the sponsor on that page.
The deal is this, you get surfers to signup for free to take paid surveys. For every free signup you get $1. Not to bad if you have some traffic!
Pretty easy to just put up a text-link, leave it there and see the cash come in. They pay by check and paypal every week.
Tons of marketing tools avalible, banners, ready-made textlinks, popunders, drop-ins, PPC, Opt-in email marketing.
Promoting
SurveyClub is literally some of the easiest money you'll ever make on the Internet if you have some traffic. It really converts well.
There you have it, hope some of you will promote this and help me save up for proper hosting! ^-^