https://www.theguardian.com/sport/2019/aug/02/what-can-traditional-sports-learn-from-the-fortnite-world-cup

The inaugural tournament’s finals last weekend were watched by 2.3 million people. Traditional sports broadcasters should be watching very closely

It’s safe to say the inaugural Fortnite World Cup was a resounding success. Developer Epic Games has announced that more than 2.3 million people watched the solo final on Sunday evening, making it the most watched esports event ever outside China. The complete total is likely to be significantly higher, as that figure only includes viewers who watched through Twitch and YouTube and not those who watched within the game itself or other streaming platforms.