The post claims both that some companies contribute to OSM and that they do not employ anyone from the OSM community. There is some level of gatekeeping here,

The post claims both that some companies contribute to OSM and that they do not employ anyone from the OSM community. There is some level of gatekeeping here, as the blog implies is that that employees at those companies are not part of the OSM community although they contribute to OSM. With this attitude ("no true OSM contributor unless I approve of"), it is hard to grow the community by welcoming new people.