Yes, it makes sense for the game company. The stream is more of an advertisement than competition.

I can see that if you organized game-streaming as an entertainment provided by a company, that company would most likely want to hire an editor to provide a best-of version.

(That's essentially how all those reality TV shows like Big Brother worked. Plus some extra dramatization, of course.)

There's economic value to consumers in getting the best-of version, so I am hoping that the participants will find a way to share the larger cake.