The funny thing I have seen is when the prices for the fake product are too low, they don't actually sell as much as when the prices are just below the normal RRP.
Sucks for the people who don't know any better, especially when some ebay sellers are calling themselves AUSkate or something which sounds a lot more like a shop name than just freddy23 or some other personal name.
The guy taking the completes apart here is a different thing - they are legit completes (all made in China) but trying to sell them for the same as or just under pro board prices is bad.
Some people will get hold of something, especially anything with any recognised brand name, and then copy it and make a good profit and sell it on to others who also think they can make money from the fake stuff regardless of the actual quality.
This is always going to happen, but it has come up in leaps and bounds with the shortages and distribution issues that are still ongoing in some areas.
I have even seen old shop owners who have been blacklisted end up getting fake stuff just to try to stock up their shop, or continue selling product, even if it is not from reputable sources.
Any which way, if it is more widely known, then hopefully there will be less of an issue and these people will look to other avenues when no one really buys their crap product.