omg nebula is incredible. i just subbed like 2 months ago and i feel like ive been guzzling from a firehouse.
A lot of content is low effort edu-taintainment that seems to be little more than Wikipedia in video form.
More original and higher integrity creators like Veritasium, CGP Grey, Engineering explained don’t seem to be involved (actually I think CGP was but left without an explaination).
Maybe this is just a fundamental problem of bundling. It makes more sense for lower value content but less sense for higher value content.
I don't think there's a single even semi-popular edu-tainment channel that wasn't at least approached by Nebula, but of course not every creator is interested. If I had to guess why, I'd say it's a tradeoff between Patreon/Nebula. You can have both, but you can only prioritize one of them, making the proposal far less interesting to those that already have a sizeable Patreon income.
However a lot of channels available on Nebula also use it as a place where they don't have to deal with those sometimes nonsensical rules, as a place to publish more "uncensored" versions of their videos. Sometimes they're as simple as not bleeping out the word fuck, sometimes they contain an extra section that would get their entire video demonetized on YouTube (example: showing a piece of art with nudity in it, or pretty much any blood), and sometimes they use it to cover topics that they know YouTube would instantly demonetize (example: pretty much any discussion around armed conflicts).
I think there enough decent quality channels (many that I was following on YouTube before anyways) that it is definitely worth my subscription.
a friend is actually a creator there! speaks very well about them