Yep. I went to the store, showed the manager the email pic on my phone, she then looked on her phone/tablet thing and it only showed a free pin set. She then called the service rep number where a guy told her it was a mistake but to honor it (he said they've had multiple issues of people calling...
Took an hour of the manager on the phone with the CS reps but got 2 copies, two sets of the Link/Mirin pins, and a $10 gift card. My total came up to $58.84.
Just tried it and got denied.
I might try it again and see if I get a different rep.
EDIT: Tried again and the rep told me it was a in-store promotion only and I would have to go to the store for the deal. After reading others who tried in-store, I don't think it will work.