Yeah, it is highly deceptive. If you go to eBay and type in "MacOS USB Installers" you will see hundreds of sellers selling it illegally there.That article is highly deceptive if not to say downright wrong. macOS (Mac OSX) has never been "free". You pay for it (and future supported upgrades) as part of the price of Mac. You are confusing "free" as in freely available, with free to use except under license conditions.