I've never considered using Ethereum on gambling websites. Even though the transactions are much faster compared to bitcoin, its high fees are not worth to use it on gambling. If a gambling website is a dapp platform where you just need to connect your wallet with funds, I would still not play there if they only support erc-20 network. There are many alternatives now that has low fees like polygon or bsc network to gamble.
Same here... high fees make Ethereum bad for gambling and moving bankroll from one casino to another! And there are many alternatives indeed, and BSC is probably the best for some time! Some casinos allow transfers on the BSC chain, so we can move any coin on that chain for a cheap price, and they are also very fast!
Today I don't make difference between Bitcoin and Ethereum casinos! Is there a difference now?! Before we had only Bitcoin and only Ethereum casinos, but now casinos accept so many different coins, some of them even allow using several different chains (native chains, BSC, TRX, ETH, and others)... they are all crypto casinos now!