I have a gift card to a certain coffee shop (also another one to a local shop!) Both were gifts for my birthday. This particular one sends emails with coupons for special offers. This item was free if I "paid" with my card.
I don't know what that meant, exactly, so I took my card, my phone with the email displayed to my local branch. Sure enough! All free.
And it is delicious. Afterthought: Who thinks up those long, involved names for a 560 calorie drink?