To this day the single most successful open source business model is the SQLite Consortium's. Their approach is to make the codebase open source (public domain even) and the test suite proprietary. Having a fantastic test suite that is proprietary acts to blunt the community's ability to fork the project, and it encourages those who want new features to pay for consortium membership because the team can't easily accept outside contributions (because in order to do so the team has to write tests for those outside contributions). It's brilliant!

I wish you well, Paul, and I'm glad that you're making open source work. I was just saying that what Bruce Perens is suggesting isn't open source.

In fact, what Bruce is proposing is a "source under glass" license. Look, but don't touch. Pay to play. Microsoft offers some companies access to the Microsoft Windows source under that kind of license. Is it open source? No.