There are some companies that it can be beneficial to be on their mailing list. One of them is Victoria Secret. I was recently mailed a coupon for $10 off a purchase at their store which to me equals A FREE TEN DOLLAR GIFT CERTIFICATE! I picked out 3 for $5 hand sanitizer and 2 for $5 mints which is more than I would ever pay otherwise. My total was exactly $10 and after the coupon I didn’t even have to pay a cent. They handed me my receipt and I left the store with more stocking stuffers!