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Browse credit cards from a variety of issuers to see if there's a better card for you.
If you have a card that gives extra rewards at a grocery store (several Amex cards and many others), and depending where you live, you can buy the gift cards there. (Or a drug store with OBC or a rotating card that covers drug stores at that time). You can also buy with a standard 2% card. There are many other options, such as malls operated by Simons.