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
lemmy.ml (through ipv6) and kbin.social being unreachable might be the culprit, kbin alone has 25k users and lemmy.ml the most users of all the instances.