I do not believe a vast majority of those people are using Linux however, or at least I haven't seen any indication of it. (But maybe some companies render servers do and maybe Blender is useful for that, but like Maya works on Linux iirc)
Edit: If Twitter wouldn't have wigged out on me I would have found the link to the clip I was searching for, it was mentioned in the first tweet in that thread [3].
[0] https://www.youtube.com/watch?v=z9ulkFRXkvQ
[1] https://mobile.twitter.com/kenarto/status/136386214032346726...
1. https://www.blender.org/user-stories/japanese-anime-studio-k...
2. https://www.blender.org/user-stories/
edit: add second link
https://www.blender.org/press/unity-joins-the-blender-develo...
source : https://lesterbanks.com/2018/09/rigging-next-gen-feature-fil...