I mod 4, but only the smallest one (worldwithoutus) is actually mine.
It has about 240 people now, so according to the 90:9:1 rule (out of every 100 people 1 posts and 9 interact) there should be 2 people posting but in reality it's not at that point yet! However, I like doing it.
The other 3 are bigger but not any more active.
very small user bases
If you're talking about the stats, you're probably only able to see how many accounts from your own instance are subscribers.
Kbin is kind of weird because the software is way less developed than Lemmy and it has regular outages, so a lot of people signed up and then left, a lot of communities got abandoned due to inactive mods and spam problems. So something like the kbin worldnews community I mod has literally thousands of inactive subscribers.