I'm also the impression that Bitplay always generates a new bitcoin deposit address every time we wanted to make a bet on roulette? What if I deposited 0.01 BTC and just wanted to make just .0025 BTC only?
Bitplay offers on-chain roulette game, so there is no things called by "deposit" as you make a bet directly from your wallet to their bet address. So it is not possible for you to make deposit or to send 0.01 but you want to bet 0.0025 only. If you want to bet 0.0025 then send the exact amount only.
I know the main idea here is that you guys are suggesting bitplay to make the roulette become offchain game like other common roulette where you can create an account to make deposit and play any amount you wish directly from the account without creating transactions for everybet.