The donation you're receiving is not a thing of consideration on whether its coming from a KYC exchange or an exchange that does not require for KYC, its not amount all these that determined whether the coins will be suspected or not for illegal financial activities, though i still understand this as part of the reason some will come and tell you they will only make use for decentralized exchanges in other to avoids other shows from a centralized one, but honestly one doesn't have to worry himself from those making donations and from the account they are doing that from.