Yes - what I mean is that Linux grows and extends itself by utilising libraries and applications which (for the most part) developers have to provide for free.
You answered this yourself, Laserlight....
It also happens to be the license that I'm most familiar with. :) and here's what I mean by "undercutting"....
Nice theory - but who said anything about modifications? Let's say you wanted to charge $50 for some great app you've written and distributed under the GPL agreement. The agreement entitles you to make such a charge but there's nothing to stop anyone else from taking your source code and - without making any modifications whatsoever - selling the very same app for just $5, or even giving it away for free. You as the author of the work can do nothing whatsoever to prevent this. And that's why I believe that the license is exploitative.

