Just thought I would post the list of sponsors known to use WebmasterChecks. I can't guarantee the list is complete, I try to keep it as accurate as possible, but if anyone knows of any more, feel free to let me know.
http://whopaidme.com/search/webmasterchecks/
3X Bucks
AMA Kings
AV Revenue
Actual Cash
Adult Real Cash
Advanced Bucks
Allure Cash
Archive Cash
Bare Backed
Be My Pimp
Belami Cash
Braz Bucks
British Bucks
Bucks Mania
Cams Network Cash
Cash For Nuts
Cash Uncovered
Catchy Cash
Celebrity Profits
Cezar Cash
Cruel Bucks
Curious Cash
DDF Cash
Diesel Action
Dirty Niches
Euro Revenue
Fetish Assets
GF Bucks
Gay Gravy
Gay Movie Source
Gay Pay
Gaytronix
Gossip Kings
Hentai Boss
Hot House Cash
Hunk Money
Idol Bucks
Jugg Cash
K Cash
Lukey Cash
Man Check
Massive Dollars
Min XXX Cash
New Nude Cash
Niche Castle
Niche Pay
Pimp Boss
Porn Green
Premier Blind
Pretty In Cash
Pride Access
Pure Teen Cash
Real Sex Cash
Rehab Dollars
Royal Cash
SMC Revenue
Sapphic Cash
Serious Cash
Sex And Cash
Sextronix
Spiz Cash
Sterling Cash
Tasty Dollars
Torbe Cash
Tranny Dollars
Tranny Pay
Twistys Cash
Web Wide Cash
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WhoPaidMe - Cheque names, ePassporte IDs, Alexa data, combined review scores, new site launches & promos, for every sponsor and every niche!