When an email is sent to the administrator of a purchase, doesn't it have the possibility of an email being sent to the affiliate when a user buys with your sponsored link or uses your discount code?
I know you have the Data Protection situation, but it can be a more incomplete email, just with the customer's name and order number, as well as the purchased items.
This would be a way for the affiliate to know what purchases are being made by receiving it by email.