i dont know but something is wrong with the logic here, we get some students saying i never purchased but stil i get error saying coupon valid on 1st purchase. When we switch to that user from admin panel in our browser we too face this issue. so we have to give uses another normal coupon.
I just upgraded to have a lack of abuse on our first customer order discounts. People are still making fake email addresses up and using our code on every order. Is there anyway to add addresses to block or have this go by address and by email to determine a first time user?