90-9-1 is the shape of the room

Comments, wikis, ideation boards, and internal chat skew hard toward lurkers and a few heavy posters. That split is the 90-9-1 principle (the 1% rule in marketing shorthand). It is a participation curve you plan for, not a moral scorecard.

In most online communities, 90% of users are lurkers who never contribute, 9% of users contribute a little, and 1% of users account for almost all the action.

Jakob Nielsen on participation inequality (2006) is the usual UX cite for that shape.

About ninety percent observe, nine percent contribute on occasion, and about one percent accounts for an outsized share of the posting. Ratios move by domain, but the tail stays steep, the same shape the Pareto principle describes in traffic and revenue.

Van Mierlo’s observational study across four digital health social networks (JMIR, 2014) shows the same steep tail in moderated health forums, where superusers carry most posts and rapid back-and-forth. Engineering forums and company-wide tools hit the same structural pressure.

“The community” is not a flat panel of representative users. Teams mine GitHub issues, public threads, and employee channels for priorities. Moderators burn out because load concentrates. Internal workflows that need free-text edits from everyone starve when the UI assumes uniform contribution.

Visible discourse is biased by construction. You should serve all groups with tools they can engage with. Lurkers get loyalty badges and engagement channels that do not depend on writing (votes, structured fields, passive telemetry, or side effects from tools people already use). Infrequent contributors might get a boost on their engagement. Power contributors still drive a notable slice of the roadmap.