knock off parts isnt the problem. The only problem i see the knock off parts doing is making trends easier to follow.

Lets say some $5000 wheel i popular. Well not everyone is going to be able to afford that wheel. But lets say Rota makes the same wheel for $500. Bam, instantly 700000 people have the same wheel.

Sure that can cause a problem when it comes to originality and how long that looks stays "fresh" but if anything it should push the guys at the top to strive to find new ways to do stuff differently.