Interesting this is now news, where a few years ago it would have been almost obvious that these events would be on Twitch, where else could they be? (not quite, there were competitors, but more specialized)
Heroes of the Storm (a Blizzard game) and Facebook signed an exclusive contract for one of their competitions: http://mashable.com/2017/01/26/facebook-heroes-of-the-dorm/. Twitch's deal here is important in the streaming landscape, with Facebook, Youtube, Amazon, Netflix, Hulu and traditional cable companies trying to get valuable content for their platform.
And that stream was an unwatchable crap with crap video quality, skipping issues and IIRC awfully low views.
Even now if you find a VOD of that stream, and check HD, it's completely shit video quality makes it unwatchable, since you can't even distinguish the icons on the interface from one another.
Your post doesn't contradict that, but it seems somewhat important context for anyone who isn't aware since the post mentions both Twitch and Amazon but not the link between the two.
The first line of the linked article says: "Twitch, the popular game-streaming site owned by Amazon, just inked a deal with one of the most popular game developers to broadcast a host of game tournaments exclusively on the service."
