Not that many sadly and from my understanding you need to be invited by them to join. There is 240 currently if it loaded and counted them correctly for me. They have a list of them here. It works for me because a lot of them make exactly the content I am interested into, but might not work or you or anyone else depending on taste.
It would be the same for me. Most of the channels I watch advertise Nebula, unless they advertise Floatplane. With these two I would have >90% of my Youtube watch time covered.
Not that many sadly and from my understanding you need to be invited by them to join. There is 240 currently if it loaded and counted them correctly for me. They have a list of them here. It works for me because a lot of them make exactly the content I am interested into, but might not work or you or anyone else depending on taste.
It would be the same for me. Most of the channels I watch advertise Nebula, unless they advertise Floatplane. With these two I would have >90% of my Youtube watch time covered.