Free Sandwich
Many restaurants want feedback from their customers to know how happy (or not) they are with their food and service. Usually, they post a link to a survey on the receipt and offer something free in return. Most of us don’t even pay attention to it but not this OP.
They realized that Arby’s was offering a free roast beef sandwich if you took the survey on the back of the receipt. The only thing was every time they went back for their sandwich, they got another receipt with the same offer. What a glorious loophole! Sandwiches are always great but those that are free are the best.