Although Lemmy's userbase is quite large,it still is small enough that I do often see the same people in comment sections. It feels though, that I should recognise more names, because I can only remember around 5 individual ones.
Flying squid spends their entire life here as far as I can tell. And just about every major news sub is owned by Jeffw. This place has like 400 active users tops.
I may be off for sure. But it's pretty easy to size up the daily users and subs they run. It really depends on the metric you want to look at. The details are everything.