Thanks for the link - that's an interesting read which I'll have to work through more thoroughly later.

  > GPL never says you can't charge for software.

My point is not that the GPL is contradicting itself, but that the GNU philosophy contradicts the GPL.

There is a quote in item 4 at that link you shared, which says:

  > I think that to try to own knowledge, to try to 
  > control whether people are allowed to use it, or 
  > to try to stop other people from sharing it, is 
  > sabotage.

Putting a paywall up is a method of control. I think I represented GNU's position fairly.