I was registered on Lemm.ee. Now I'm registered on piefed.social. So, technically not Lemmy anymore. I do suspect a lot us moved to piefed. That was the general buzz. I genuinely don't know if the posts and comments of Piefed don't track on Lemmy. I'm sure the ones amongst piefed users in piefed instances don't though. That alone could justify a substantial part of that drop. But I'm still here interacting with Lemmy.
Seems like poor metrics. Need an average across time. Also, if that's the case even with that and with how easy it is for ordinary people to get an account on another server, does that mean we dumped a ton of bots?