Peter Thiel is known for his financial support of both neoreactionarism and various types of out-there futurism; I wouldn't be surprised if he's involved, and I'm sure he's not the only jillionaire with similar interests.
I have no idea whether Urbit is as significant an idea as Mr. Moldbug suggests, but it's too interesting not to try out at least.
Do you have examples?
I'm on the record as having several severe criticisms of EY/MIRI, but being neoreactionaries is not one of them.
I'm referring more generally to the "Dark Enlightenment" than just neoreactionaries. In that group I include pretty much any group focused on alternatives to liberal democracy, with carve-outs for Marxists and fascists. EY fits comfortably into that category (see his "Politics Is The Mind-Killer" tract).
Whether this is what most other people mean with the terms you just used, is another point entirely.