I've gone through the advogato archives and picked out the following as relevant discussion.
- Advogato's Number: The Economics of Software Complexity
- Importance of Non-Developer Supporters in Free Software
- Open Source Metrics
- A Rebuttal to Meyer's "The Ethics of Free Software"
- Towards an economics of free software
- In- Roads to Free Software Development
- Ask the Advogatos: why do Free Software projects fail?