If 100 signups is all it takes for OSM to release a 22-page postmortem full of charts, then OSM has bigger problems.
The "alarm" is caused because concerted action of roughly 10% of the OSMF membership could easily tip the current wobbly balance one way or the other, and there is no guarantee that the current "hands-off, low budget approach of the OSMF would survive such an upheaval.