Yes, I know it's border line but what else you can do if you really need the product?
Well, that's a fair question. I think the answer is that you have to be prepared to own the problem.
Quite frankly, I've got a bin half full of fake Prolific PL2303's somewhere around here. We got them WAAAAAAYYYYY back in the day back when I was outfitting staff with WinXP laptops back in ~2006-2007. The new laptops didn't have serial ports and as a networking/server/etc company we're often hooking up to serial ports. I was specifically looking for something without a cable so I
picked up something that are probably either the predecessor to these or were in fact these. They were just a little more expensive at the time

So they worked great for many years, but in 2013 we refreshed into Win8 laptops, and they stopped working. Then I found out about the whole fake-Prolific thing while trying to figure out why they didn't work. I didn't blame Prolific. I didn't expect Prolific to make these work. I chalked it up to bad luck and the ones in the bin will probably be discarded as soon as someone here actually figures out that they're effectively useless. We have new (Prolific I think?) USB-RS232 adapters now. Life goes on.
Similarly, I didn't blame Intel or expect Intel to make fake Intel ethernet cards purchased through NewEgg work.
NewEgg (sucks eggs) refused to allow us to return them because it had been a few months, but that's what happens when you need to deploy kit in a data center half a continent away. I can't justify a thousand dollar trip out just to collect fake cards.