https://account.microsoft.com/rewards/r ... 0400000014

Go here, buy a code - $5 for 500pts, $10 for 1000.

Get the code in the mail, go to the Microsoft store online, buy a 5 or 10 dollar gift card. Apply the code you got in the mail. Free gift card.

Even on sale, the best deals are like 7000 for a $10 code, so $10 for 1000 is a hellacious deal.