You are probably still right but MIT license means that you just won't see what industry uses. Industry has used free BSDs and not contributed in code or money nearly to the extent that it has for some Linux flavors.
https://en.wikipedia.org/wiki/SCO%E2%80%93Linux_disputes
Earlier a USL (Unix System Lab) lawsuit went after some BSD stuff:
https://en.wikipedia.org/wiki/UNIX_System_Laboratories,_Inc.....