Hmmm... so VIN assigned but then didn't get the actual VIN afterwards then means factory priority. What happens if I ask a SA to assign me a random car to get the VIN only to reject them later cause it's not my build / what I wanted... but I got the VIN, will that get me the factory priority.... May or may not be onto something here.
I think the VIN needs to be originally assigned by the factory for this to work. Otherwise I'm sure the loophole would've been found already. In my case, they said there were several folks whose VINs were reassigned to other customers because cars wouldn't reach them in time at EOQ.