Or, if you want to just pay the item cost and not have to round up to the nearest $10, use snapCard.
Snapcard has a 2% surcharge. Gyft actually pays me 3% back on every purchase. There's nothing better out there.
Gyft is great for specific stores, if you don't mind having to buy in the exact increments of those stores' smallest giftcard values. Frequently, I don't mind that. Sometimes I do. More often, I want to shop somewhere not currently available through Gyft.
I hope they expand their store availability. I would definitely use them more if I could buy gift cards at more grocery/super markets and restaurants, but where I am located, there is not so much available to me. Being able to buy Amazon gift cards is great, though.