Starting on Sunday 7/17/16, Staples is running a promotion (page 12) offering a $15 rebate with the purchase of $300 or more in Mastercard gift cards. The Deal Buy $300 in MasterCard® Gift Cards and get a $15 Staples® Gift Card after easy rebate. The Rebate The rebate is done completely online and the Staples gift card generally comes via U.S. mail within 4-6 weeks. Key Terms Valid 7/17/16–7/23/16. In store only. Limit 1 per household.