I hope Duelbits will add soon the TRC20 and BSC20 version of USDT since only ERC20 USDT is available while other blockchain is already available on the casino.
If duelbits adds this it will be better than other coins in my opinion, because these two stable coins have cheaper transaction fees compared to stable coins on the ETH network, when I saw the news duelbits added apecoin then there are possible that those stable coins outside the network of ETH will most likely also be added to their payment system.
every casino should also think about transaction fees if only they pay attention to it of course many users will gamble there, sometimes people prefer to look for alternatives for cheaper transaction fees sometimes using the ETH network is so annoying and eats up a lot of transaction fees