Most of the knock-offs come from China, and in China it's acceptable business to plagiarize, perhaps even encouraged if you're plagiarizing from non-Chinese com

Most of the knock-offs come from China, and in China it's acceptable business to plagiarize, perhaps even encouraged if you're plagiarizing from non-Chinese companies. See https://www.youtube.com/watch?v=9loDBwp5ST0 https://www.youtube.com/watch?v=9loDBwp5ST0 They can get away with selling internationally either by selling directly from China, or just playing whack-a-mole. Often companies in the west will pop up to sell the products to domestic markets, and by the time the law comes chasing after them they've already disappeared. Usually the law isn't interested in what they are selling, but only bothers to chase after them when they don't pay their sales taxes.