Originally Posted by
gengar
No, this is definitely not correct IME. I have never once used SAUA on BR when I>0 - i.e., every time I have used SAUA on BR, it has been on a flight where Z>0 and I=0. The reason for this is that I only ever use SAUA for one-way tickets when straight award redemption is not available.
That was definitely my experience as well. Or at least I=0 for sure, had a friend check EF but we didn't know to look at Z. Rolled the dice on upgrade anyhow (where's the harm?) and it cleared instantly on a one way B fare.