- 1% of the user population might start a group (or a thread within a group)
- 10% of the user population might participate actively, and actually author content whether starting a thread or responding to a thread-in-progress
- 100% of the user population benefits from the activities of the above groups (lurkers)
M-à-J : Une autre étude beaucoup plus complète de PEW en format PDF abonde aussi dans le même sens. Via Benoît Raphaël.