You need to understand that there are a variety of ways that we get "knockoffs." The best quality ones are usually factory seconds (figures with small flaws that were deemed unfit for retail and stolen by workers) or figures run by the official factory after closing time. The bad ones come from garbage batches with really bad flaws that people stole anyway, or stolen molds run in crap-quality factories by workers who just don't care. In yet other cases we get figures that are sort of backwards-engineered, which is where we get oddities like the Hellboy with the tampoed coat instead of embroidered, and the changed joints.
There are some pretty clear indications that we get a healthy mix of all of these when it comes to 1000Toys.