Are you being dense on purpose? The knock offs were never going to operate/spend/make as much as the actual brand. New Balances are mostly still made in China, its likely how the IP got stolen.
New Balance was never going to be replaced by one of these guys, its a global brand. New Balance was a much much much bigger market share than those two companies combined.
as I said, China is only about making their set goals. in whatever way that takes. before New Balance figured it out, the chinese were padding their numbers with the knockoffs. once it was caught China risked losing the bigger brand, which would have dwarfed any of the gains from keeping the knockoffs.
This is like asking why Coca Cola is more important to the US economy than the knock off brand Dr K.