You would be surprised at the viewer numbers on twitch for any given night, just random sampling can show hundreds of thousands of viewers.

Plus a lot of the people who are streaming there do links back to Amazon, Newegg, and similar, for the gear they use or want. I am curious if Amazon will put pressure on the streamers to limit links to non Amazon sites for goods.

Plus with private streams its entirely possible they may leverage it into a webex type business.