"Same thing happens at many places of business. How many times have you seen a commercial for McDonalds or Burger King for a great deal just to go to a store and the cashier tells you that they’re not honoring that sale."

I've seen many such ads and they always say "at participating stores..." [or something to that effect]
, it's irritating, but they have that disclaimer as a defnese. In this case, no such disclaimer was in the
ad.