stake has no USDT as payment option but they have TRX though. afaik, bitsler and sportsbet has USDT but on ERC20 network. i don't think you can find a sportsbetting site with free USDT withdrawals esp if they are using ERC20 chain.
i don't know if the OP is just promoting 1xbet here or really looking for sportsbetting site that meets his criteria? because for sure he already heard some of the sites mentioned above, sportsbet in particular.
I know they have no USDT but TRX and XRP can compete with that in terms of fast execution and lower transaction fees that's why I said to OP that it doesn't make some difference to 1xbet if they are just promoting that USDT even if It's TRC20 too since stake has TRX. I think he really is to shill 1xbet here and no other thing.