[BlueTemplar]

Valve Corporation is one of such private companies, mostly known these days for its Steam game updates and store platform.

Being private didn't prevent it turning into a monopsony, ironically for the discussion, maybe because its competitors were mostly public companies (and so didn't care enough to do a good job) ?

They are not immune to walled garden issues though (SteamWorks), but maybe their private structure helped enshittification to proceed much slower ?