I think stake have some kind of incentives for KYC-ed customers. For example some promotions are only available for level 2 verified players, for other you receive double the reward if verified.
Yes, it's a lucrative incentive, isn't it? Moreover, they get a second time reward, of course there will be many users flocking to do it so it will not be surprising if KYC has now become commonplace in casinos.
I even saw that with a higher VIP level and he had not done KYC then at that time if I'm not mistaken $250 will be incentivized by Stake.
That's interesting if you do it you get some kind of reward now, but in the future it might be mandatory for players from certain countries. I'm curious if they want more players verified due to regulatory reasons or they just had too many people with multi accounts abusing those promotions before.