Pretty cool gaming thing. Don't need credit cards or anything, just make an account and play. Basically if you win a game against someone else your money doubles, you start at one cent.(1 cent, 2 cents, 4 cents 8 cents, 16 cents etc etc. If you lose it goes down the same way.
If you want invites http://www.moola.com:80/moopubs/b2b/...63774e54513d-2