Staples is offering their deal where when you buy $300 in MasterCard gift cards, you can get a $20 Staples gift card by easy rebate this is valid 4/23/17–4/29/17. Make sure you use a card that gets you benefits when shopping at Staples, like the Chase Ink. See Business Card Offers here.
If you purchase 2x $200 Mastercard gift cards which will cost you $206.95 each or $413.90 for both. Use easy rebate for the $20 Staples gift card back and score the points or cash back on your credit card.