this post was submitted on 12 Jan 2026
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A post from 2 days ago presented a graph that showed an important variation in the active userbase: https://discuss.tchncs.de/post/52565659

Using the daily rather than monthly view on https://lemmy.fediverse.observer/dailystats&days=120 shows a much stable line (especially if you take into account Piefed's growth: https://piefed.fediverse.observer/dailystats&days=120 )

Going through the comments in the other posts, a few recommendations that can help with the overall experience

Finally, a few communities recommendations for lighthearted communities

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[–] PeriodicallyPedantic@lemmy.ca 3 points 2 days ago (1 children)

A statistician explain to me why these graphs seem correlated beyond general trend? They both seem to have localized events on the same day, but given their different timescales that doesn't seem like it should be possible.

I raised the same concern on the other post too, but idk enough about statistics to for sure say something seems fishy.

[–] Die4Ever@retrolemmy.com 5 points 1 day ago (1 children)

(not a statistician) The events that WOULD be synchronized are: instances going down, users being deleted, and new user signups.

Maybe this is enough to make them look like this. Those are the events that cause jumps, whereas users hitting the 6 months of inactive time would just be a steady, stable, gentle slope.

[–] PeriodicallyPedantic@lemmy.ca 1 points 19 hours ago

Im not sure how these stats are collected, I assume that they query each server for its to make the chart, rather than query every server every day and copy the results.

If they're really copying the results, then you're absolutely correct that temporary instances outrages would cause those correlated downward blips, but I'm surprised to hear you wouldn't just be able to query servers to get this data on demand.
But then again if a server went permanently offline you'd lose that data forever. Hmmm