Hello!
Though I read about 50 percent of this thread, I don't know where exactly to
add this replay. So I put it topmost.
Eric S. Raymond has an opinion about that in his paper called "The Magic
Cauldron" (17. Appendix: Why Closing Drivers Loses A Vender Money):
http://www.catb.org/~esr/writings/magic-cauldron/magic-cauldron.html
Read the whole paper if you wanna know, in which cases open or closed source
makes sense.
Andi