What made you say that there would be a KYC in stake?
AFAIK they aren't going to implement it and just take a look at primedice it has been for long but still doesn't have a KYC AFAIK .
So I think stake wouldn't require KYC too and there is no such news right now about KYC on the site.
Unless there is some funny things going on around your account and the coins you deposited in them, they will not ask for KYC and there is never a complaint from any legit users regarding any issues with the site even when they are withdrawing their money and the only issue i remember they had was when there was a DNS hijack and they locked the accounts even with two factor authentication and while contacting the support they took swift action and was able to recover the account.