I've thought about this. Essentially, whenever a channel gets moderately successful they will be contacted by various agencies trying to 'sponsor' them.
All the people that make video for fun hardly get seen, and if they do it's not long before they sell out.
That's kind of the glory of the fediverse, though. We can have communities using the same protocol that never interact with each other.
There can be completely separate fediverses that cater to different people.