First indicator of a scam. I have found a lot of similar style of fooling people like this one, and It doesn't make sense doing deposit before you can withdraw. I don't see any relevance in doing so. Plain stupid.
I guess they deliberately let the new users to win so the user will be forced to do a deposit.

No proper announcement thread, OP cant afford copper membership, and no further details on their gambling website. What else do we expect?