a.k.a. the 90–9–1 principle. Does the Fediverse follow this rule, or are there more creators here as early adopters? Are you a creator, a participator or a lurker?
If you follow OP's link, the wiki suggests another rule that I think is more accurate. The 1–9–90 rule. 1% create new content, 9% (including you and me) contribute, and 90% lurk.
This rule precedes Wikipedia and originally applies to you things like BBS boards and the like.
I believe it about Reddit. Most people show up and browse /r/all. That's why spez freaked out about big subreddits like pics and ELI5 going NSFW. Those are the biggest eyeball magnets, regularly appearing on the main site.
Some users learn that they can subscribe to specific content and make accounts only for that purpose. A few actually make the effort to submit posts and comments.