By definition, for collaboration to work, you need to both produce and consume.
If you are only consuming, it is not called collaboration.
Many people want the benefit of shared knowledge repositories and cry out for their creation when they don’t exist or cry out for said repositories when they are unknown to those who could benefit.
The problem is repositories often don’t exist, because of the inertia in thinking that it is somebody else’s job to post what I need to know.
A distributed group trying to coordinate it’s effort will be successful only when it finds a critical mass of people willing to step out and share, question, think out loud and initiate with the rest.
Collaboration works best when the ratio of producers to consumers is moving towards 1.