Amazon's $970M purchase of Twitch explained ... as best as possible

So what was Amazon (NASDAQ: AMZN) thinking when it swooped in and paid $970 million to acquire a streaming platform, Twitch, that lets viewers watch other people play videogames? Like the Zapruder Film or Stonehenge, that's a source of endless, perhaps neverending, speculation. Still, FierceOnlineVideo's Samantha Bookman embarks on a dedicated quest to better understand one of the big media buys of the summer here.