Not sure how it is now, but back then it was “last in wins”. There were tons of sites that claimed to have coupons, discounts, etc. In reality all they had were the same affiliate links that I did. And they were very successful at tricking people into clicking their link. So people would use my site to find the tires they wanted. And then searched for “falken azenis coupon” or whatever. Clicked on a fake link. And suddenly my commission was diverted to one of these fake coupon sites.