Isn't this "pay 0.01, get 0.02" a one-time promotion for only one user, which was taken by a Staff member already? It might just be a (failed/naive) promotion from someone, and isn't necessarily a scammer running a "Bitcoin doubler" ponzi. I have my doubts here, and even though it's usually scammers who come up with this, I can imagine a honest clueless Newbie can think this is a good idea to promote his website.