Wired Article on the GPL

[Chip Salzenberg]

According to Richard Watts:
>  Of course, the author also gets vicarious benefits from the
> perceived greater reliability of the software he uses which is based
> on the software he's written, even if none of it was actually
> distributed to him [...]

I've got a better argument there (though, of course, IANAL):

What makes a consideration valuable to a person depends on his value
system.  For example, most people like money, but some people care
about other things more.  So if free software is important to the
original author, I would call an addition to the body of free software
a "valuable consideration".  And surely a test case would prominently
feature the original author testifying to that effect.
-- 
Chip Salzenberg              - a.k.a. -              <chip at valinux.com>
"I wanted to play hopscotch with the impenetrable mystery of existence,
    but he stepped in a wormhole and had to go in early."  // MST3K