I didn't know there was a term for it. I gave it a shot one or two years ago buying $500 gift cards at grocery stores with a 6% cash back card (amex cash preferred). With the activation fee and taxes, I think each gift card purchase essentially returned ~$22. Surely not the most efficient - but it was simple. Each time I bought a $500 visa gift card I had that uncomfortable feeling like I was doing something illegal - the cashier calls out some code on the intercom and the manager shows up 5 minutes later to allow the purchase to go through. It wasn't worth the hassle - at the end of the year I might have made $150 - whoopty doo. At least I made enough money to pay off the annual fee for the card ($75).