From Bitcoin Wiki
The DoubleCoinup Game
DoubleCoinUp is a kind of gamesite. A player invests any amount of BTC (between 0.01 and 10.0) with a very good opportunity to double his or her bitcoins.
- Bet minimum: 0.01 BTC
- Bet maximum 10.0 BTC
- 50 % winning chance
- See Details on Website
- 100% fair and uncheatable
- Instant payout. When you win you will receive your profit instantly.
How to play
- Step 1: Register your bitcoin address and send 0.01 to 10.0 bitcoins to the shown address.
- Step 2: You have to wait until the bitcoin network confirms your bet. In the meantime you will see your name in the waiting list.
- Step 3: The server matches you with the next person in line. The server determines who wins based on your transaction hashes. If you win, you will receive an instant payout.
Double it up!!!