If you buy $300+ in Mastercard gift cards from Staples between 3/19 and 3/25 you can send in an Easy Rebate online to get a bonus $20 Staples gift card. This is valid in-store only. Officially there is a limit of 1 rebate per household. If you buy 2 $200 Mastercard gift card in store you’ll Want to continue reading this post? Click here!