CIS 2017 in Volgograd.

Good point, but there are some issues. First is the players' own desire to stream; you can't force everyone. Second, you need good and stable internet, so that nothing drops and there's a possibility for a quality stream. You also need devices that meet the requirements for a quality stream.
Since there were indeed many viewers and interested people, which is good, it makes sense to increase the visibility of this tournament.
Accordingly, if you think it through properly and prepare before the start of the tournament, it could turn out very cool.
For example, there are two people (one can't handle it if there are a couple of central matches in the first round) who are going to the championship with the goal of streaming. Their task is to set up streams and commentate interestingly, conduct interviews, provide analysis — in general, a whole bunch of things, this goes into the planning section. It would also be good if these are well-known, knowledgeable players who, for some reason, are not playing in this particular championship or have ended their careers.
:) From the organizers, you need that very internet, whatever it costs. There's also the issue with a relay from the players, somehow setting up the retransmission properly.
IMHO, the result will be — excellent visibility, cool streams, a ton of positivity, donations (for streamer motivation). In general, something like that; if the organizers and streamers have the desire, it's in the bag.

P.S. Congratulations to all finalists on the victory!
The Pole is a really cool guy; at 19 he didn't chicken out after all the moments on HeroesWorld with Cobra and Lizard (and even beat him in Heroes — he's an artist; if he went a bit further, he really punished him further and also took care of another young guy — put everything in its place, Polish revenge for the last championship :smile54: ) came to another country, didn't notice anyone until the final, and if there were more prize money in the first place, who knows what tricks he would have pulled — these are Heroes after all, in short, a cool guy!