That can be the reason why they stopped or it's about the volume that they're getting and it's no longer enough to support the bookie so, they decided to dive into another venture for most casino games.
I doubt you can cheat on the odds since they still get a 5% cut no matter what their players bet on and even if you do get better odds it's very easy to turn it around knowing the volumes aren't that high. I think it's safe to say the volume is the main issue since the parimutuel style of betting isn't that common in crypto sportsbooks compared to the fiat and skin betting sportsbooks. Also it's really discouraging to make a bet when you see low volumes on most of the matches they offer and that only hinders the growth of their sportsbook so you can't blame them for pulling the plug after a few years.
That's very noticeable and why they've not become a popular sportsbook in the market and also in the forum, although some really knew them that they're made as a bookie.
When I bet there, the volume really isn't great and encouraging but that's how it goes. Even with small bets since it's mutual betting but anyway, good luck to their future business.