They aren't worried about the frauds either. Probably flattered that their brand is the one most copied. That alone says something about market share.
So just what do you expect Leupold can do about it? You'd have better luck beating Usain Bolt in the next olympics than getting a cease and desist order against a Chinese entity, in China. They don't give a ratsazz about patents, trademarks, etc. Zen Ray actually made a pretty decent spotting scope (optically anyway) that could use a Swarovski eyepiece.
