This is true. I used to work for a company that would assign coupons to shoppers based on their shopping history. One of our biggest hurdles was avoiding people

This is true. I used to work for a company that would assign coupons to shoppers based on their shopping history. One of our biggest hurdles was avoiding people who would, in a sense, reverse engineer our coupon dispersion so that they could purchase large quantities of various products. In the end we ended up having an employee become a member of the sites and forums where these people hung out and to attempt to cutoff these types of scams before they got out of hand. But it was normal for someone to have store managers orders cases of non-perishable items that were bought on a buy-one-get-one deal. People would also purchase items on coupons and then return them at a later time for full value or store credit. It was amazing to see. Many of these people would resell these items at garage/yard sales or on ebay.