99% of the affected channels make less than $100 per year. I don't think most of these types of videos are made with a plan to make money. I think people like making videos explaining things they understand.
Mentions among creators drives me to new channels and I add to Patreon.
You could just plug it verbally and skirt the enforcement of the YouTube rules that way, but if they became concerned enough they have automatic transcription and did start enforcing it on annotations/descriptions...