if you buy more than 10.000 pcs our price 10$/mh.
That's probably based on the "overclock" speed? Because I can't imagine doing that for 0,5 mh/s per stick

15 roughly per Mh/s at the moment. Would you consider sending a set of samples out to certain known forum testers?
1.65Mh its a regular speed using powered hub. 0.5 its a downclock speed to meet usb 3.0 standard 1A@5V current. It can be overclocked even higher than 1.65 but it depends on asic and require good cooling.