what they need are coins that can give fast transactions, low transaction fees, and as less network issues (like congestions) as possible.
USDT have those traits since it's a token but they're accepting a few altcoins already.
People want this to be stable but it is not actually a stable coin, I still prefer others coin instead of "stablecoin" because to be honest, it is actually does not need to be stable coin to be added on gambling site. There should be a volatile coin, why? Because with the volatile coin, both side will get the benefits and it will be mutual benefits. And with a stablecoin, what will it do?
I agree it's not stable but still less volatile than most cryptocurrencies.
Why not add up some stable crypto like USDT .
I think gamblers would also like to see it .
Besides we know that betting platforms also attract people who aren't familiar with crypto so it would be nice to add up other option.
They could add stablecoins if most of their users asks for it but I don't think it'll attract a lot of new gamblers since they don't have an exchange and there's only few casinos accepting USDT.