Here's a response from OldBuddy:

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I'm sure they're not the only ones either, just the most popular. If you think about what they do it should be obvious to anyone who takes part in the rip off.

Oh I'm not saying they cheat the people who join, of course they wouldn't do that! The scam is perpetrated against the poor advertiser that is offering a nice bonus for people to try their product or service. These are honest businessmen and women who are just trying to make an honest buck and are willing to give in order to receive.

So along comes CashCrate and TreasureTrooper to exploit them, just like Fagin in Oliver Twist (http://en.wikipedia.org/wiki/Oliver_Twist ). Instead of picking up street orphans to train as pickpockets, they find Internet Surfers and train them instead. They teach them to sign up for theses offers and just before they have to pay, cancel everything and bring the money back to CashCrate and TreasureTrooper so you can keep a share.

Who do you think is making all the MONEY???? Just like Fagin, they have everyone scrambling to get a piece of the ill gotten gains.

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Good luck!