CbproAds - An Alternative To Google Adsense - are you a member yet

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I have seen this advertisement network few times. They claim that they are an alternative to google adsense. They show clickbank ads. I can not figure this site out. I mean for what they will pay. I can not see anything. Except alternative to google adsense. I want to know that: Do they support CPM Do they support CPC Do they support CPA/CPL Are they paying or scam Please if you are a user or know something about this site then let me know. Should i join this site?