A bit about using the gift cards at Starbucks:
A. Gift cards are accepted.
B. The app (on iPhone or other smartphones) is accepted- they don't have the scanners, but they can type in your card number from your phone.
C. If you have a gold card, you dont get the usual freebies (syrups, soy, etc) unfortunately, but I believe they do take standard in park discounts (annual pass, cast member, etc)
D. I've heard that, like Market House on Main Street, that there are free refills if you keep your receipt.