For cheapskates like me, this royally sucks. The free sandwich card has been a staple of my fast food dining since I was a little kid (I still remember "double coupon Wednesdays" in Atlanta).
You would think that Subway could investigate some sort of scannable card to defeat forgery. I think they are just taking the easy way out to rid themselves of the program. Too bad... I can definitely say that they will get less business from me as a result.