How Discount Codes and Coupons Work
If you've ever used coupons at the grocery store, you know how it works every day. You cut coupons out of newspapers and magazines, take them to the store, and use them to get discounts on certain things. A coupon is the same as cash. For example, if you have a coupon for $1 off a case of grain, the clerk will take the coupon as if it were cash. It doesn't happen as often as it used to, but some stores will double the value of a coupon. When the clerk takes the coupon, there is a problem at the store. It already has a small piece of paper that is worth money, but the store needs to mail the coupon to the maker in order to get the money. In small print on the back of most coupons, the company writes the street number and says that it will also give the store some money for preparing the coupon, usually 8 cents per coupon. If there were only a few coupons, it wouldn't be too hard to get them back, but large grocery stores collect a lot of them. At that level, it becomes a maj...