Commercial show matches.

As an option, you could use a pre-prepared save file to eliminate imbalances in smaller maps and avoid restarts.
I think this format is quite suitable for that – it's not a tournament game after all.

The interest from a sufficiently large audience could attract the final of some major offline tournament or World Championship, similar to what Sticky organized.

Provided that you can't see the World Championship final between AtG and FireToSky, for example, anywhere else, in a live broadcast with commentary from, say, Psycha or Mike from goodgame – in this case, I might be willing to pay a certain amount.

But in the case of fan games, even if they involve strong players, but are specifically organized for the purpose of making money, where there is practically no suspense – in my opinion, the probability that people will pay for this is zero, especially when there is SC2TV, Twitch, and so many regular streams from Heroes players.

+ it is also necessary to think about the expenses – paying for the creation of the website, paying for its rental and support, paying the players (or will they play for free, knowing that the organizer will make money from the broadcasts of their games?)