Hacking Subway's $5 Footlong

Today at lunch I went to Subway for a $5 Footlong. The Italian BMT (whose initials apparently don't relate to the meats it contains) looked tempting, but it was $6, and I wasn't too keen on the salami, though the pepperoni and ham sounded good. I asked my sandwich artist if it were possible to either double up on pepperoni or ham and he said no. Then it hit me...there is a $5 black forest ham sandwich, to which I could add pepperoni for $0.50, in effect giving me the substitution they wouldn't allow, with a $0.50 discount to boot! Had they simply given me the substitution int the first place, I would have paid more.

Does anyone else have an example of hacking restaurant menus?