Thanks Jason.  I enjoyed reading this, though the conclusions remind me of _Seeing Like a State_.   Not all edits, editors, and subcommunities are equal.  Trying to shift about contributors en masse in a way that is convenient for large organizations (or for those of us who like crunching large datasets :)   can be a total failure in practice.  

Let's set up a new space where we can experiment with fast influxes of newbies.  The current large projects are not suited for this.