Ace Hardware stores charge higher prices for everything, so the customers don't shop there unless they have to. Therefore, Ace has come up with this Rebate scam to boost their sales.
Once you buy a product, you are tempted to cut out the UPC label and mail it to get your juicy rebate back. Then when you try to return the product for any reason, they decline the refund because you have alread cut out the UPC label and now you are stuck with the purchase. Very clever!!!