Hello,
I think I read that 'Free' software can be closed - not available for peeking or modification. In which case, it's as good as proprietary/conventional software - I might be missing something here...
You cant close (this way you are violating GPL :)) Since you are not passing on the same freedom which you get before closing.
Thanks & Regards, Mitul Limbani, Founder & CEO, Enterux Solutions, The Enterprise Linux Company (TM), www.enterux.com