Something I realized: If you visit a community on a different server, it doesn't show all subscribers. Like on Feddit.de, it tells me that there are 993 subscribers for this very community. But if I visit lemmy.ml/c/memes it shows that the community has over 18k+ subscribers. Maybe it only shows the subscribers from your own instance? Like 993 People from Feddit.de are subscribed to this community? No idea.