That would be excessive IMO, Although a casino should send using decent fees demanding remuneration is almost impossible to achieve, also calculating it would be another issue.. Technically the withdrawal is in the blockchain so their job is done.
A good solution however is to let the player set the fees himself "with a minimum of 0.0001", This way, the player can't complaint sine he/she is the one who decided the fees.
Imo that's not a good solution the minimum should be more than 0.0003 to 0.0005 at the very least because if gamblers start using fees as low as 0.0001 their transaction could be rejected and this could cause more problems to the casino.
Yes that is true, but some sites tell us to pay like 100k sat but in the end they just use like half of it to sent or even lower than that to take some profit from our transaction fee too. So it feels like they take 2 things from us, either win or lose we need to lose and to pay
I only experienced this when I made withdrawal request from moneypot they charged me with 500 bits and used less than what I gave them.