This site has turned 1-year old this January and seems a solid and stable site, with 150000 members.
Has four standard ads available for free members worth $0.004. Upgraded members get more ads and higher click rates. There's usually a good extra number of fixed ads, so it seems the site has a good group of advertisers, which is good for its stability.
I was already paid by this site ->
http://www.ptcbox.me/forum/YaBB.pl?num=1390688010/0#0Rented referrals are good, but not "suspiciously" good.
There are ad purchase commissions for all types of membership
To join through this downline builder, use this
http://www.goldenclix.com/?ref=ruicarlov