Heh, cross post Pert'!
I reckon that section that you posted renders the sale worthless. If someone is selling a version (modified or unmodified), then anyone else can buy it and distribute it under the GPL, i.e. FOR FREE. The sold version must include the GPL, which states that it can be distributed FOR FREE. The seller, unless it's a really hot game, and no-one catches on for some time, is therefore unlikely to make much money out of our work. They might make a little, but nothing worth worrying about.
While I personally would prefer an explicitly statement of 'no charge', I think the reasons for doing it the way they have done, while complex, are reasonable.
I reckon that section that you posted renders the sale worthless. If someone is selling a version (modified or unmodified), then anyone else can buy it and distribute it under the GPL, i.e. FOR FREE. The sold version must include the GPL, which states that it can be distributed FOR FREE. The seller, unless it's a really hot game, and no-one catches on for some time, is therefore unlikely to make much money out of our work. They might make a little, but nothing worth worrying about.
While I personally would prefer an explicitly statement of 'no charge', I think the reasons for doing it the way they have done, while complex, are reasonable.