:^/ You're correct there, so it'd be a scam (abd even against the law) to re-sell commercial software and so on. However, it seems to me that it's a little different when one re-packages writing that others have left on the Internet knowing the whole world would have access to it.
As I see it, as long as the seller makes no claim that he actually created the material, there's little one can do against him. He's just re-distributing to those who wouldn't have been able to access it otherwise.
:^/ I know how irritating that can be, too. One one occassion I was searching the web for information related to Cricket on the Tr