I also think adding TRC20 or Bep20 network for USDT can give convenience to their player and possible prospects.
Just in case OP is actively reading the comments here, I would also like to suggest adding USDT TRC20 as it's cheaper to transact using such compared to USDT under the ETH network which is currently listed as a deposit method. Personally, I'm using XRP for my gambling needs, the fee is cheap and it confirms faster, but if they'll eventually add the coin we requested, then I think I would be attracted to using a stablecoin.
OP since 2020 was last active and it's very unlikely when he starts to be active again reading one by one the replies to suggestions from customers who are here, and maybe the way our suggestions can be read by OP when he's active again, maybe some people try to send messages giving suggestions for adding a network TRC20 on USDT coin for more effective reach.
I really agree and support this suggestion if the Duelbits team pays attention to it and can be considered. because the TRC20 network on USDT makes it very easy for customers to deposit at a low cost and very fast.