>My YouTube channel also used to net closer to $1k/mo (about 100 coding tutorials) and as a result of frequent algorithm changes and algorithmic demonetization now nets shy of $100 per month.

Please correct me if I'm missing something here: It appears like that channel hasn't had a new upload in some time. That could explain the drop in revenue, I wouldn't expect a channel to maintain the same revenue indefinitely without new content. At some point videos get saturated.