A lot of the 20k+ follower accounts are in the onboarding list for primal. They get highlighted during the setup process and so get a huge boost to their follower numbers.
Discussion
I'm on #Amethyst only and I tried a couple of clients. But you know me i only use 1 npub when i use nostr and have the time 👌 soow over 17k are bots or fake/alts npubs ?
I'm not sure if you're on the primal list, but you are a prolific poster, you go hard 😂👌
Npub.world does a good job filtering out bots, it seems like it has more accurate counts. A telling things about the profilestr site is that it shows about 13k active users, but some people have follow counts double that. It's definitely still counting bots in the follow count.
https://npub.world/npub1ujm8l8mupgwvu8pye2ged78pg3huectlmm6at66x5wffgvl2fkgsygt8l4