Over 850,000 people paid to watch the Logan Paul / KSI fight on YouTube

"At its peak, more than 860,000 people paid $10 to watch Logan Paul and KSI’s months-in-the-making fight, but that was nothing.
A number of illegal streams on Twitch gathered more than 1.2 million viewers. These were people interested in watching the YouTubers pummel each other, but didn’t want to spend $10 to do so. In the realm of streaming and YouTube, a few hundred thousand people may not seem like a big deal, but at $10 a person, that works out to $4 million.
It’s a huge loss — not just for KSI, but for YouTube. The company is taking an unannounced percentage of the proceeds as a hosting fee. Even lowballing an estimate of 30 percent, which is just under the company’s normal 40 percent cut it takes from creators’ AdSense revenue on videos, that’s approximately $1.2 million in losses."
Source:  Polygon, 26th August 2018
Note - not too sure of their maths - the 1.2m people watching on Twitch are independent of the 800,000 paying on YouTube, so the potential loss of revenue is 1.2m x $10, not 400,000 x $10.