This is really no different than PWRS selling their stuff only through PORTERS or whatever they call their shopping cart .. ER has their way of doing business - its their choice. If you want their cars, you can buy them from them, or wait for the secondary market (E-Bay, swapmeets, etc) .
I personally have an ER account - and may actually buy some things on occasion .. my bigger complaint is the prices -everything @ ER is over $20 .. that's beyond the point where I will readily pull the trigger for for a box car - it has to be something I REALLY want.
As far as China and enforcement of IP laws - that's a bigger issue than just the choo-choo market .. they will do whatever they need to keep their economic engine going.