I do think there is a difference between selling replacement parts vs. a complete clone, but that is for the manufacturers to deal with. If they won't defend their trademarks/tradenames/patents it's certainly not my responsibility to do so. My 19 year old car is full of aftermarket parts. I just put in a front crank seal branded as Felpro, made in Mexico. I doubt that Ford made the original seal, and if I bought one at the dealer it would be some aftermarket part branded as Motorcraft. I would never buy a vehicle if I had to get all the parts from the original manufacturer.
The chainsaw clones I have are Zenoah-based designs, and it is clear to me they had some sort of licensing/production agreement, as they have sold them as Zenoah products. The no-name clone was missing parts and had things mis-assembled, but the Earthquake did not. The missing parts were replaced for free. Both of them are used regularly, run great and are dead sold reliable, even though the castings are rough (granted that the Earthquake has been heavily modified). They would not be appropriate for pro use, but they were not intended for that. I doubt I'd buy an assembled clone made to look like the real saw otherwise - but how about a kit of aftermarket parts sold as such? What about old and out of production designs, like a replica '32 Ford or '66 Mustang?
Excessive clearances, rough castings and pitted chrome are the norm, but the pitting would have to be extreme to make any difference at all, and castings can be cleaned up. I have to laugh at some people's expectations for a dirt cheap chainsaw that is shipped across the world. That and the starry-eyed wonder at the magical parts from Germany or Sweden, as if the parts got sprinkled with fairy dust just because they come from Europe. Chainsaws are not particularly sophisticated machines, and they've pretty much been commodity items for a long time. Anyone could make the parts, of any quality desired, including the Chinese if you were willing to pay them the profit margins. Strato and feedback carbs are about the only things that have happened recently, and the Chinese can't sell those here. Ironic that if not for the emissions laws the Chinese would own at least the lower end of the market already (they may soon anyway), and that everyone hates the American made saws even more than the Chinese ones.