See point 14, where they clearly said they reserve the right to ask for valid identification of a user under the KYC procedure for some cases. For asking KYC you can not say they are scams. Maybe they have found something suspicious.
They stated it that KYC is required for withdraw. Check it again.
But if the user is suspicious, they can ask for KYC again. I have seen many sites that like doing that, asking for KYC again or asking for another documents to make sure that the user is not trying to manipulate with fake identity.
I asked them on email if they have found any suspicious activity from me other than winning approx 100 euro. I asked if my IP or device was used on other accounts. They just do not want to pay, is that simple