I hardly can imagine that casinos show their actual balance. I think the post was inspired by FTX collapse, is it?
Yes, it's inspired by the situation that FTX has done. It can be applied to casinos to show how much they've got on bankroll and that's to give the confidence from their users if many of them are demanding to show it rightaway.
That should be by choice, running a casino company in the Beer market is not a compulsory act.
There are casinos that have voluntarily shown how much they've got in their bankroll and how much was invested to them by their playing investors. Anyway, it's a bear market brother, not beer.