Offer your thoughts or opinion on the input financial query or topic using your financial background.

Can you buy gift cards at grocery store to receive a higher reward rate?
If you go to a grocery store and purchase retail gift cards along with other products, and you pay with a credit card, your credit card company generally does not know what you spent the money on; they don't get an itemized receipt.* If this is the case with your rewards card, then yes, you would get the cashback reward on the gift cards, because all the credit card company knows is that you spent $100 at the grocery store; they don't know (or care, really) that $50 of it was for an Olive Garden gift card. This, of course, should be fairly easy to test.  Buy the gift card, wait for your statement, and see if they included the purchase when calculating your rewards. * Note: I don't have an American Express card, but from some quick googling I see that it is possible that American Express does actually receive itemized billing details on your purchases from some merchants.  If your grocery store is sending this data to AmEx, it is possible that the gift cards could be excluded from rewards.  But again, I suggest you just test it out and see.