It could be about programming.dev and lemmynsfw.com stat changes: https://github.com/LemmyNet/lemmy/pull/4235TL;DR: By default, Lemmy only counts posts and comments for active users. These instances also started counting the votes. According to Lemmy NSFW admin, there are 3 times more active users with lurkers.
Absolutely. Other social media platforms count as active when we mistakenly enter their sites :)