I think those who don't get a bonus offer will ignore the KYC because they can create an account anytime.
What's the point of users ignoring the mandatory verification procedure just because Stake hasn't offered them a bonus? If there is a desire to continue to use the Stake site in the next year, then it will be necessary to pass the verification of the 2nd level. In any case, this is not the first and not the last time when Stake offers bonuses.