They have provably-fair odds if you choose to partake in gambling. That's not dodgy.

But they try to sucker you in to increase your payout rate or something like that after you buy a shitload of some shitcoin. That part is dodgy for sure.

I just open it hourly to play their FREE BTC game where you "roll" to try to get a high number (1-10000, i think). A chance to win ~$200.00 hourly for free aint bad. Worst case, you just stack a few more sats every hour.