But online cryptocurrency casino's act in the same vain because both trading and Gambling are the same it all aim at either profits or lose, but while gambling plartforms let go of the fees, exchange charges us on each regardless wether we make profits or lose in the trading position.
Exchanges and gambling casinos are two different platforms with different functions. Exchanges charge us trading fees because they don't make a profit in our trading activities while gambling casinos does not charges us because they have this house edge that can generate income aside from charging fees from the game providers.
There is no reason for the gambling platform to charge their players since the casino had already laid out a strategy where the player can lose his bankroll. If they charge people in every bet they made then I think it is overkill. Like charging a slots player in every spin he made can be devastating for the players bankroll. Imagine charging the player 1 cent for every spin he made, this will decimate the gambler's fund if he continues to spin for 10 thousand times to 100 thousand times.
So once the casino implements a fee in every bet then I will probably stop playing since I feel that it is not fair.