They did get a strike about that, or possible several times. For example, https://twitter.com/linustech/status/1008752236027973632?lan... talks about it and I strongly remember a wan show being almost dedicated to the same topic.

If I recall right, they have said that there were not that many users who came from youtube so it doesn't matter much, and that wan show itself isn't really a money maker in the first place but rather a place where they can vent and just talk a bit about random stuff. They later changed their setup so the same stream goes to youtube, twitch and floatplane at the same time but they don't know if that is within the youtube rules.

Here's where they talk about it: https://youtu.be/SKtJY6soCds?t=698

Doesn’t floatplane stream to multiple services? You have 1 system to stream to many.

I don't know the rules, I'm not a YouTuber. I don't think anyone has ever accused Google or YouTube of applying their rules equally, though.