Why did the tracked Lemmy user count plummet to pre-blackout lows?

https://lemmy.fmhy.ml/post/40993

Why did the tracked Lemmy user count plummet to pre-blackout lows? - FMHY

It seems to me this is probably a statistical error, Lemmy seems to be alive and well with lots of content flowing in, but the stat counter is showing a massive drop following the huge surge the past 2 days. What am I missing?

I don't know nearly enough about the infrastructure to have any educated input, but I'm curious if instances upgrading to new servers affects the reported numbers as well? I don't know how user data is being scraped from all instances, but I'd imagine that server changes could affect that. Again, speaking out the ass, but that's my 1 cent.
That makes a lot of sense. lemmy.ml has the largest userbase by almost 3x