From a timely Facebook Live profile; tangentially, see It looks like all the money Amazon is spending on streaming video is starting to pay off (Recode)
"Facebook has locked down exclusive deals for live videos from 140 major newsmakers and tastemakers. Millions of us have already friended or liked some of them. So when you get an invite to a Facebook Live show, there’s a good chance you’ll want to watch it.Live from everywhere, it’s Facebook - The Boston Globe
Facebook has also done a deal with video game maker Blizzard Entertainment, creator of “World of Warcraft” and “Overwatch.” People who play Blizzard games on a desktop PC will be able to broadcast the games over Facebook Live. Odd as it seems, watching other people play video games has become immensely popular. Amazon.com’s Twitch, a site that specializes in such broadcasts, draws 100 million unique visitors per month.
Events will also conspire to raise the profile of Facebook Live. On Wednesday, for instance, Democrats in Congress held a protest to demand a vote on gun control legislation. The House went into recess, shutting off the live video feed on C-SPAN TV. So members began streaming the event on Facebook Live and Twitter’s Periscope, and soon attracted an audience of thousands."