Amex Offers: 10% Statement Credit @ Office Supply Stores YMMV $5 max

[VegasVegan]

There is also a 2% back at Staples if you have added it to your card already. They should stack.

Details

Get 10% back as a statement credit each time you use your enrolled Card in-store or online at US Office supply stores by 9/17/2018. Limit $5 in total credits