I worked with China companies a lot and it's hard for them to make a finished product like Apex. However, an individual in USA can EASILY create something similar to Apex because Apex is a very simple electronic device in the view point of an EE in USA. Of course, to ask an EE to stop his 80,000K a year job just to create an Apex look alike is not easy.
It's the culture of manufacturing and engineering. The guy who did the controller in RC and release info for FREE, can design, build, and debug the Apex similar in less than week, I would say. But to ask a China company to do something out of their normal of mass production, it takes 2 3 years. That's what happened when I dealt with them. I even gave them the schematics(note I know about how mass production works too) and why it would be competitive in the US market, they just don't wanna go out of the the norm. You see, they have TONS of workers waiting for salary, they cannot stop feeding them for 1 second, so the general idea of management is not to rock the boat. Worker revolt is very common in China. Do you know how many owners of factories in China continuously jump off the building when the worker revolted?
The most expensive cost in making the Apex controller and/or many consumer grade electronics is start up cost of the case, not the electronics. If you can put up the cost of $10,000 to manufacture the custom case, you can make an Apex for less $30 bucks in electronics.