Reading the article made me think about other examples of
Commons-Based Peer Production (CBPP). The Wikipedia page on CBBP
lists examples like Linux and OpenStreetMap.
Although CBPP shares a lot with general User-generated content (UGC) and the open source model, maybe mechanisms that make it work is a little different.
The article points out system-side elements like "Talk page" and human-side elements like policies and guidelines.
I wonder if there are any studies on this subject.