I just wanted to say, for anyone else who read Demons, by Fyodor Dostoevsky by John Psmith and googled either of the two names Melkhorbalai or Uztaa-Binoreth, let's talk! I got to the article maybe similarly to how you did, in being curious about Demons / The Possessed by Dostoevsky and wanted to read about it a bit in advance.
When I think of the egregore concept as it's used in the article, usually it's in regard to Neal Stephenson's Snow Crash and the idea of a "metavirus" or information virus. Some questions / thoughts I have are-- maybe some people want to be antennas for the metavirus? Why are humans so succeptible to it? The more common and less infectious form of this could be the "meme", which so many / maybe all of us participate in. And all of this is taking place in the noosphere, which is an exciting realm to think about.
If anyone would like to discuss this, I'm open to it! Feel free to contact me.