You should definitly check out traffic cash gold ...
1st : they probably have the best stats interface
2nd : their shit sell
3rd : they got one of the biggest repertoire of sites in adult
4th : They pay 35 $ per signups ... 40 $ if you send them enough traffic to get the "whale bonus"
5th : they have been arround for years now
6th : They also got a naice variety of niche reality sites
I could name many more if I took the time
Traffic Cash gold