I mean ethereum literally charges 20+ bucks for many things, does that really make sense to spend that much just to deposit and withdraw? Who would be fine with that? Instead I go for smaller things and use them, in some places I use doge, in others I use tron, and I can even use USDT in trc20 in one place which makes it very fun because it is still dollars so I know my bankroll and I still can deposit and withdraw very cheaply.
The worst part is that most crypto gambling sites don't provide an option to customize the fees for withdrawals due to which many gamblers end up paying way more than expected sometimes due to price fluctuations.
I use TX accelerators sometimes when withdrawing BTC from some crypto gambling sites that allow gamblers to customize fees.
Personally, I usually depend on LTC and Dogecoin for withdrawals since their fees are usually the lowest(literally dust). Sites like Duelbits etc need to learn from Wolf.bet when it comes to offering multiple cryptocurrencies as payment methods.