Anyone else see this as you start the process?
"You can get preapproved for iPhone X until 4:00 pm MDT on 10.26"
...then in the email confirmation
"This preapproval will last for three days after pre-order begins."
Yeah, what they are saying is, you can go ahead and get pre-approved if you are an IUP member, up until 4pm on the 26th. After that, you won't be able to be pre-approved.
If you do go ahead and do it and you are pre-approved, and if you decided not to pre-order it, your pre-approval will remain valid until 3 days after the pre-order begins, so 3 days after 10/27. After those 3 days, you will need to get pre-approved again.