I think comments would be a huge value add. Patreon already has them, the pay wall really seperates out most toxicity.

Even if it was opt in by creator, community building tools for the less technical Nebula creators could be a major selling point to get more similar brand creators to join.

I’d be okay if was even simply unfederated comments (or microblogging), which would likely be better for the creator, but I’d love threadiverse communities for more creators.

I imagine not many creators are terribly keen on the task of moderating such a system. Even if the amount of assholes is reduced by having to pay for it, it may still be nonzero. I can also imagine it to be a liability issue.
Plus there’s no need for it.
Nothing stops you from discussing their videos with the community on any platform. Those who have access will be able to use the link. The YouTube crowd can join in once it’s up there, but most will probably stay on YouTube.

Well. In that case, I’d leave it up to the creators to enable / disable comments on their videos.

Great idea! Considering the state of their app I don’t see them having the time and resources to have tight integration within the app, but even just an automatic post for each video and a link in the description would be great.

I think they said they see no need for comments on Nebula for the time being