@Mathiau - never asked or expected UT to open up the proprietary add-ons. I'm talking about the core "Lite" system that the community uses. It's GPL'd. The code is legally available to everyone. That's a non-issue.
Revenue comes from propriety add-ons and support. My experience is that the "hacking" community for personal projects is often the same group of techies influencing IT purchasing decisions at work.