It’s way more than a few hundred. What leaked was the twitch subscriber payout, which doesn’t count all the money spent on bits. Then there’s also sponsorships and youtube content.
I follow several Path of Exile streamers, and when that released they said that that was not the total payout. They usually do some video guides of builds for the game that, alongside twitch generates content for them. Then there’s also sponsors for gaming rigs and other kind of stuff, sponsors to try new games… Maybe it’s PoE specifically but even streamers that oscillate between 200-800, maybe 1k viewers when there’s no other PoE streamer online earned more that minimum wage with just the twitch payout (given the country they live in ofc).
Given that the leak was the annual earnings from subs your question is irrelevant since it shows that the total average amounts enough.