Think about what that implies... There are only 3 venues available to a product; or the approach to a product, if you will. Official channel, a knock-off of said product, or a completely original design to the same idea, labeling it as a 3rd party approach. 4th party, per definition of the prior 3, would simply be another labeling of "knock-off", especially if it used aspects of either of the previous 3 mentioned in it's design. We can make up new words and slang-term just about anything these days, but labeling something as 4th party and claiming originality is laughable at best. Show z may be just on the same bandwagon from hearing someone else use this term, and said it without knowing it's plausibility or what it really infers. Not a knock to you, bro... It's just a knock off is a knock off, even if it's hybridized.