I read your topic before answering
https://bitcointalk.org/index.php?topic=1040815.0You need escrow freezing 0.5 BTC as reserve to legitimize your game.
You already invested 0.2 btc to prove it.
So I can do Escrow for you, and keep your reserve safe, so player could bet quitly.
I will hold in multisig wallet with nlocktimes option
for now it will be free ( you pay only tx fee).
If volume of your bet will increase you will deposit more to cover bets
In that case may rate will be regular.