It is probably due to a number of people stopping using their alts after some instance hopping.
Also a few people who came to see how it was, and weren’t attracted enough to become regular visitors.
Curious to see at which number we’ll stabilize.
Next peak will probably happen after either major features release (e.g. exhaustive mod tools allowing reluctant communities to move from Reddit) or the next Reddit fuck up (e.g. removing old.reddit)
Stats on each server: https://lemmy.fediverse.observer/list
Honestly, I didn’t really start using Lemmy until Sync for Lemmy was out. I know it’s a closed source app which gets a lot of hate around here but it is already very full featured and a great browsing experience. The developer listens to user feedback and is invested in making the app the best he can.