Just to expand upon Calypso's great post above and something that was touched on yesterday, with the exception of the Visa, MC, and Amex gift cards, all of the other gift cards mentioned above, including many chain restaurants, can all be purchased electronically using the Ink products via the Gyft app and received instantaneously to obtain the 3X/5X. Using this method, we find it's rarely necessary to actually go to an actual office supply store anymore.
Disney gift cards are not available via Gyft, so if you truly have no other option to purchase Disney gift cards than you will have to go to one of the stores. However, by simply obtaining a Sam's Club membership online (if you don't have one already), you can take
Walmart gift cards purchased via the Gyft app and subsequently use those to purchase Discounted Disney cards via the Sams website or local store. Once you recoup your membership fee, there really is no reason to not save approximately 8%-10% on all Disney gift card purchases versus only 5% by purchasing directly from the office supply store.