Did GregKH "flat out tell" Canonical employees to quit?
He did say that if your current employer discourages you from contributing your work back upstream that you should quit, yes. Is there anything wrong with this sentiment? It applies to Via, TI, and all these other pseudo-open-source sweatshops that dump an unlicensed almost-working ball of code on some FTP server and disappear. Is this an accurate description of Canonical? Probably not.