Is it hard to find volunteer moderators who wouldn't block off access to sub reddits? I also doubt the number is as high as 20k. As long as the top mod aligns with Reddit, the other moderators can do nothing.
Well I am hearing of them for the first time. Yeah I could be an ignorant, or they are not as relevant as you make it sound. A quick wiki search mentions they are best known for providing datasets for Stable diffusion and Imagen.
And if this is your counter example, then it proves my point that the Americans far more innovative currently.
I think a 6000km vertically downward hole is very unstable and will collapse into itself. Any real feasible geometry would just require so much mass redistribution that it might significantly affect the planet's moment of inertia.