Casinos are still considered a very high risk business because it's still a target for money launderers until today, which is why they've got very strict rules in place in regular ones. Accounting is strict, KYC is strict.
Online crypto casinos I don't believe are as vulnerable because every satoshi can be tracked;)
Yes, you're right, even that is a requirement at every casino, but KYC is meaningless if the case is like the case of BTC-e exchange, have you ever heard of this case? the owner and the perpetrator are suspected of working together.
Until now, the reputation of stake.com is still reliable so I'm not sure they do but for promotional purposes, it's possible.