I guess you don't watch much YouTube. A lot of large YouTubers (like Wendover Productions/Half as Interesting) have been doing sponsored ads for a thing called

I guess you don't watch much YouTube. A lot of large YouTubers (like Wendover Productions/Half as Interesting) have been doing sponsored ads for a thing called 'CuriosityStream' which is basically Netflix for Documentaries/Non-Fiction and as part of a bundle if you subscribe with their link you get Nebula for free as an extra for as long as you pay for CS. It's mainly existing content from YouTubers but with premium exclusive videos like Patreon has.