Don’t Want to Give Supermarkets Your Number? Use the ’80s Song ’867-5309′
Many grocery stores have rewards cards. You've seen them -- in exchange for letting the store datamine your purchasing behavior, you get discounts off your bill. Some people, though, are creeped out by the whole thing and feel it's an invasion of their privacy, so they skip those discounts. But they may not have to anymore. Savvy shoppers have figured out a way to get the cheaper food and ward off