I went once in Vancouver, paid waaaaay too much for essentially a 25 cent product and never went back. But apparently some people want their Starbucks coffee quite badly:
A Starbucks customer in the US who was told her free drink voucher was worthless is launching a $114m (£60m) lawsuit against the coffee colossus. Starbucks pulled the free drink offer, saying it had been redistributed beyond its original intent.
There is this thing in law called de minimus, things so tiny that the law can’t see them so it doesn’t bother with them. A free coupon for a coffee is about as de minimus as I can imagine.