Depeg might be a reason, but the balance showed exactly $10 no difference at all. The weird part is Dice worked fine even with $5 bets. If depeg was really the issue, it should have affected other games too, not just Sports betting. So still not sure what really caused that "Not Enough Funds" message at that time.
I am seeing it in originals as well. For instance, if I wanna do 0.01 bet, I need to add a little bit more in USDT otherwise it won't accept it as 0.01.

The USD rate right now for USDT is less due to depeg—1 USDT = $0.999085
Thanks for that. I just made a deposit to try the site and those $10 extra will do good. I think I'll try one of the challenges you posted above— but slot ones, that's what I've been playing the most lately.
Good luck.

It seems people are grinding. Their challenges are down to 20 right now. I think I've seen like 27 last night. They should be adding more though. What I like is how there are challenges friendly enough for small fishes as well. I've seen 250x to 500x multiplier and bets of 20c and 40c which are within my usual setup.