Valve doesn't care what people do with their assets as long as it's not actually pirating the game. This, too, has been the case for years.
it's still copyrighted
whether they press charges or not is their decision
this is certainly another one of many situations where badspot doesn't care, but strictly speaking it's still piracy
so if, for some reason, you make your decisions based on legality rather than morality, don't download them
