Heck, they even appear to have let their main offering - their Search Engine - slip into shit over the past few years.
Originals was a feature; features come and go all the time.
The only thing with Originals did was provide them with resources to make slightly higher production value content, but it seems like said content didn't perform as well as the creators own content.
The creators are still free to find their own production company and produce similarly polished high production content if they want, but again, I doubt that content is worth it on a platform like Youtube.
Having owned several Nexus devices due to their rootability, it's remarkable how much better the comparable Samsung models were.
[1]: https://fuchsia.dev