[geofft]

Communism, as commonly defined, is a system of government. If there was any government compulsion for Linux to exist, or even if there was government-funded work in making Linux better than commercial alternatives, you'd have an argument. But this is a product that people use in the presence of excellent commercial alternatives.

Also, it's totally untrue that it's public property (it's private property, just a lot of people's and companies' private property), and that you're not allowed to make money on it "directly". You can make as much money as the market is willing to pay you. If you are selling things that are already publicly available without any added value, that's probably $0, but that's not the result of any permission not being given to you, that's the result of you failing at business. If bottled municipal water is a thriving industry, there's no reason that providing GPL'd Linux patches in a useful form can't be a thriving industry (and in fact it is).