Well, I think It's not a question of valorate the art or not.
The point is that all those impressions that the stores sell, not are his arts and none originals. They are selling material that they have either scanned or downloaded from other websites, when this was not a business and was shared for free. So they are simple businessmen speculating on arts that are not their property.
Anyway, in this forum, I only request that people that downloaded here free, now share for another people the same way.
Greetings.