Well, I would have suggested Stake to anyone asking me for a crypto casino but if you are looking for alternatives, maybe Cloudbet? Full caution though, that I havent used them in a long long time and I do not know how their reputation stands at this point of time. I do remember that they did have keno a while ago and it seemed good back when I did use them.
Well, for me, aside from the fact that i am wearing stake's signature, i will still recommend stake to anyone any time of the day, i am a very frequent player of Keno and trust me when i say that the game is not rigged in any way as declared by the op.
I also sometimes, or should i say most of the time, most especially when i am playing and discover that i am not winning, i do assume or have that feel that the game is probably rigged, but the truth is that, this is just how gambling is.
I have said it here before that, luck is not something that is always with a person all the time, there are times, like in a week when you will be so lucky and always winning every game you play, but after that time, there will follow several weeks or even months that it will be kind of difficult to make a single win, most especially, if the gambler focuses only on playing games that are purely based on luck, this is why is good that sometimes, we try betting on sports, rather than give all out attention to casino and slot games, and when we are not winning, we accuse the casino or the game provider of rigging the game.