Stake implementing this requirement likely means one thing: regulators are directing them to do it, which also means they’re being monitored carefully.
it could happen, with the large amount of money circulating at Stake which makes them able to get supervision. after all, previously they were not a casino that would not ask for KYC. maybe previously gamblers were not required to do KYC and could still play and even make withdrawals. now Stake has taken a policy that will definitely make its users choose to do KYC or leave Stake. even with the bonus offer given by Stake for its users who successfully do KYC within a certain period, Stake really appreciates its customers. maybe some feel this is a setback because those who previously gambled for years at Stake without KYC have to be made difficult with KYC. even though the process is not actually difficult.
And this will force many old Stake users to leave the casino when they can't complete the KYC verification. The bonus offer doesn't attract many because they believed in privacy but the decision has been taken by stake so everyone most do the KYC verification and if any refuse to do then he or she must leave the casino for another. And from the it is, many are doing it because of the bonus. Those who don't have much funds in the casino account would like to do it so they can have the $250 to play games in the casino. Everyone has their different reasons to do and not to do. And the choice is theirs.
And what Awaklara said is not far from the truth. The regulators might have instructed them to verify all the accounts in the casino.