[xvedejas]

In Age of Empires tournaments, they simply put the players in a different room from the casters/audience, with live streaming cameras. Maybe because live audiences are relatively rare in these tournaments, there's less of a demand for players to be physically in the same room as the audience?

[reidjs]

You may be thinking of pre twitch/YouTube. These players sell out coliseums for $100s of dollars per ticket. The fans want to at least physically see them play, even if it’s through a window. once you rely on webcams then you may as well be watching on twitch for free.

[ace32229]

Specifically, this year's TI finals tickets are $699+fees for the 3 day pass.