Have you seen Cory Doctorow’s Free Book experiment (redux)?
Cory is offering another free book, with an interesting philosophical approach:
For this project, I’ve taken an oath to lose no money. That means that my capital expenditures have to be as low as possible. In the ideal world, every object I make available will either cost nothing to produce or will be physically instantiated only after it has been ordered and paid for.
The question is: would he make more money if he just sold everything?
Probably not.