Oh, I'm sorry, I didn't see earlier that it was about affiliate earnings. If it is the first withdrawal, they may have additional checks before approval, although I'm not sure why additional checks are needed because affiliate earning is calculated only after a successful transaction.
In order to have withdrawals enabled, we will request to provide description of your project or social activity
Because they ask to check proofs of public posts which includes the ref link, only public affiliation is ok as per their conditions.