Amazon's video game boss just explained where its $970 million Twitch purchase fits into its most profitable business (AMZN)

Amazon raised a lot of eyebrows when it bought the massively popular Twitch game-streaming service for $970 million in August 2014. Why itwould spend so much cash for Twitchwas a real head-scratcher -- live game broadcasts onthe internet aren'texactly what you would call core to Amazon's retail business. Things got murkier in late 2016 when Amazon announced that it was getting into the game businessdirectly with three new PC titles, starting with multiplayer brawler "Breakaway." At the Game Deve...