Earlier quoted context omitted.
This doesn't really answer my question though. Seems like the other comment to my question is spot on. If you divide all company actions into making money or saving money then open sourcing your toolset is more of a saving money thing as you can get people who aren't on your payroll to contribute to them. That's all well and good but not exactly what I think of when someone says "making money with open source."
That seems like an accounting mindset. Engineering is not a cost center (to be minimized) it's an investment in the future. This view offers a lot more flexibility and options - including cooperation. It also suggests that you may get back more than you put in. Invest wisely of course.
You can also get back significantly less than what you put in.