One percent rule

The 1% rule of online communities states that only 1% of website users actually generate content while the other 99% simply consume it. A variant of this is the 90-9-1 rule, which states that 90% of a community consists of passive observers, 9% actually engage with the content (i.e., through likes, shares, comments, etc.) and 1% generates it.

While the 1% rule has not been decisively proven to hold true across all communities, several peer-reviewed studies have demonstrated its consistency across multiple online groups, such as digital health social networks.