I disagree. No idea where this thought that PG is their hobby/side business, etc, came from.
For me this opinion comes from the point of being the most likely reality.
Unless it's all cash from sponsorships w/ Nicklaus, it would seem only logical that the actual money has been in TV and design visualization work.
Do you think the limited sales of this game have really been enough for them to exist and prosper for all this time?