The money is actually made from Patreons, not the ad revenue. You'll find most popular youtubers can get upwards of 10k a month and significantly more if enough of their followers throw them $5 a month.
On one of my late night interweb surfs I found THIS site:
https://graphtreon.com/top-patreon-creators
Because I was curious when one of the webcomic guys I followed started drawing..."lewds'. Basically his characters naked. It was weird.
But he gets $4k a month currently and its slowly creeping up, from people who want to support his...drawings.
Surprised that only this one poster hit the nail on the head. The days of generating a sustainable income from adsense revenue are over. Now it's about receiving donations via Patreon. Many youtubers created Patreon accounts when their Adsense revenue started drying up after the adpocalypse (Vegan Gains is one example of this). Some content creators also accept donations in cryptocurrency, and put their bitcoin/litecoin/ethereum address in the video description so that people can donate to them that way.