We do know that some reservations have to be converted by 08/01 or 08/31. Def First Editions. Not sure about premiums.I'm not doubting you, and it certainly seems fair, but how did you find out about the process? One issue is obviously "how long" someone can hang around to convert a reservation and have that timestamp slot them into the queue.
There has to be some kind of drop-dead-date to hold an unconverted reservation in line. My guess is that it's whatever the production lead time is. We don't know what that is for the Mach-E, 8, 6, 12 weeks once production starts?