Non-paysites or non-traditional paysites that can be promoted in conjunction with traditional paysite.
Totem is obviously quite well known and converts extremely well. Another really good one is
T-Shirt Hell. Find and link directly to a shirt that is at least semi related to your niche or whatever you are promoting on a given page. Only pays $4 per shirt, but it's really easy money.
Midget porn?
Milfs?
