Known scam.
You register, gets a fake 15 usd, put bet in the roullete and win ~500 usd
and get this message
"To protect against abuse of the promotional code, you need to make at least one minimum deposit of 0.01 BTC or 0.40 ETH. After making a deposit, your account will be unfrozen and the withdrawal will be available to you."
DONT WASTE TIME THIS IS SCAM