It alleges repeatedly that Facebook, Apple, Microsoft etc “employ nobody in the OSM community”. They do. Microsoft even employed the founder of OSM, Steve Coast, for a while.
If your criterion is ‘involved in OSM prior to current employment’, I could name a bunch of people currently working for Facebook, Amazon, Snap etc of whom that’s true. (One such person even stood for election to the OSM Foundation board this month.)
But, as others have pointed out, I’d hope we’re more welcoming than that. As far as I’m concerned, if you’re editing OSM you’re part of the community.