I reserved as soon as was possible couple months back. Had two reservations, the first was just the phone. Changed mind, reserved again phone plus camera, both reservations for the Pure White. Fast forward to August 17th. Got email that I could change reservation to Black Moon by contacting support. Did that, asked to change one of the reservations. On a lark, on August 17, submitted brand new reservation for Black Moon plus 360 camera. Got the email to complete the purchase same day on that August 17 reservation. Took three more days to get the original reservation update response. I’ve ignored it as I’ve got a fully paid order from the 17th. Bottom line. Not just early reservations were able to get in on this as of last week.
Source : http://www.droid-life.com/2017/08/22/unlocked-essential-pre-orders/