I don't know how the exchange system works but this has been implemented since the first modern crypto casino was launched including Sportsbet and Bitcasino.
If all bets end in USD of course it's less profitable luckily all our bets here go back to crypto so the dollar value in the game is only temporary when we play the game
So overall it doesn't hurt us in exchange rate it's different from sites that implement direct exchange when our cryptocurrency is converted into dollars when making a withdrawal
Both of these methods are sometimes liked by users and some don't, so that's the choice we prefer.