I just went through my following list and realized how many I was following that have not posted for over a month and unfollowed them all. They were all part of my automatic onboarding. I did notice some kind of preference for those who were primal subscribers. It would be an interesting idea to have something set up where automatically unfollow people who have not posted after a certain amount of time.
Discussion
There are some DVMs and scripts like that. I think nostr:npub1nxa4tywfz9nqp7z9zp7nr7d4nchhclsf58lcqt5y782rmf2hefjquaa6q8 has one.