If you are using a Hilton Amex for the gift card purchase, be sure to buy them at a grocery or drug store so you get the 6 points per dollar. I buy Ebay gift cards at the grocery and then go to Giftcards.com thru Big Crumbs and simply buy more ebay gift cards at face and get the 36% of the seller fee back in rebates, almost $2 per $50 card, or 4% on your money. Rinse, lather and repeat.