Software is either free or it's not free. It's either restricted or it's unrestricted. It's either proprietary or it's open.

Using hyper-capitalistic entities like Google and Facebook as a defense of the viability of free software is an interesting way to go. If anything, I'd argue they are almost perfect subversions of Free Software. Going a little deeper, a place like Y-Combinator is an even further subversion because, at it's core, it is a company that specifically exploits the profit motive of developers.

That aside, I think it's not particularly useful to argue that Stallman's contributions to the field are a vindication of his basic philosophy. Especially when those contributions are being used in a way that subverts it.