Buying American Express gift cards through online shopping portals can be a great way to increase rewards or save money. On September 2nd, though, American Express completely withdrew their gift card business from all online shopping portals (see “Amex gift cards withdrawn from portals”). Fortunately, Amex has now brought their gift card business back to at least one portal (hat tip: Miles to Memories), but for one day only. TopCashBack is offering 1.5% cash back until midnight tonight (9/30/2014).
For full details of how and why to buy Amex gift cards, please see this post: Everything you ever wanted to know about Amex gift cards.