I still cannot use it's VID/PID?
I believe the license agreement between USB-IF and Atmel / Microchip / Arduino (everyone else) specifically forbids it. However, more than one vendor has snubbed USB-IF. And, there are certainly people who have "rolled the dice".
In any case, you need to direct your question to the appropriate party. The USB IDs belong to Atmel (and Arduino and AdaFruit and probably PJRC). You need to direct your question to them.
While you are waiting for a response, Microchip (aka Atmel) has a sublicensing program...
...please let us know how you fare.