Not only have the Chinese put ALL the parts on the board, they have put it in a nice box, with readout, knobs etc and tested it. Sure REAL amateurs would roll their own. I know two of these rare people.
I don't think there is any law prohibiting the use of open software being used in a box that is sold. Icom sell rigs with D-star which is supposedly open source.
Yes I know about the "commons" agreements but that's really only a voluntary code. Try prosecuting someone in China or America for making a quid from offering a complete working box using open software. There are android type computer operating systems using open source material that you have to pay for. And so on.
Ideally the Chinese would have made some sort of arrangement with the designer which would return a few dollars to him for his effort. But if he really wanted to make money he would not have offered the code for free. More power to his pencil but good ideas are always going to be used by someone to make a quid.
PS, I haven't put an order in for the not yet in production model.