You mean that we can enter your game and play 10 games of it? 1 gem=1bet? Are for sure? Because some people having this good analyzation that can win huge in 10 games. And do you have any requirement to withdraw after they win some of the games? This is of course a free money, but it is possible to convert the gems to usd or btc or it is just like a playmoney?
That's the maximum you can, 10 gems = 10 bets.
You can also bet 5 gems in 1 bet, to increase the winning amount.
Withdraw requirement, yes. Minimum amount to redeem depending on which country you're at.
Sorry that gems cannot be converted to USD or BTC but you can turn into coins, and coins can then be redeemed as USD or BTC.
Let me know if I can help you more!