Yea, if we go by what openai says, a YT video with 1-million views centered on NBA-content would generate between $4k-$12k, and for NFL content between $3k to $8k. Tho of course other types of advertisements and sponsors can blow that number up, some say as much as $30k per 1-million views.
From what Gil was saying, Gil's Arena was averaging about 1.1 million or so total views a week, and said Gridiron averages about 400k views a week. So even if you go with the high end estimates, that's great for a 1-man show but not if you're splitting it 4-ways + a full production team and budget. It's no wonder you see the Double Toasted guys and now Jeff Teague's 520 crew doing road shows and spamming merchandise. Or always emphasizing the "super chat", etc
Ultimately getting picked up by an Amazon, Netflix, HBO, ESPN, etc., is the more lucrative/stable play for these mutli-cast shows.