Check your inbox, Xbox folks. Microsoft may have dropped a nice surprise for you over the evening. The company has been giving away free copies of Killer Instinct for Xbox One giving dedicated fans a fully unlocked version of the free-to-play fighter. Of course, these fans will have to pick up an Xbox One to play the game, so it's a rather brilliant move on Microsoft's part to ensure Xbox One purchases.
The email can be seen here. According to @Xbox, "a variety of factors" were considered for the reward, including Gamerscore and Xbox Live tenure.
Perhaps the most surprising bonus: some fans will actually get free Xbox One consoles--no Doritos necessary! Congrats to those of you that were randomly awarded the swag.