I buy the cheapest Subway combos on Tuesdays, when double stamps are given. (I also accept stamps from anyone.) Once a book is full, I go to the mall, watch a "dollar" movie, go to the food court, order a small soda (or have a water bottle with me) and get the most expensive sandwich on Subway's menu for free!
HI everyone, I work at Subway and it is true, the stamps are no longer accepted in many areas, ours is Colorado, the stamps were stolen by the roll and offered on ebay at a very low amount, however, the daily specials are now going on. Different sandwich every day for 2.49 (6"), at least in Colorado anyway. We were not told where they were stolen from but all stores in our area stopped accepting the cards. Sorry.