You don't need mailing lists - it works for bricks and mortar stores. I bought a groupon 1/2 price coupon for a fancy clothes store (Gap). I wouldn't normally

You don't need mailing lists - it works for bricks and mortar stores. I bought a groupon 1/2 price coupon for a fancy clothes store (Gap). I wouldn't normally go in there but for $10 they got me to go in and buy $50 worth of shirts. I will probably even go back. Or they could have hired some 17 year old super model I have never heard of, for $Ms to promote them in a magazine I never read - but that wouldn't have got me in the door.