Originally Posted by
firestarter197
Just as a data point on upgrades waitlisted for approval by revenue management, this is not possible if the only business fares left are business flex. Been told on the concierge line that they are not even able to waitlist upgrade requests when all that is available is business flex, let alone happen to get approved.
I think whoever told you that might have given you incorrect information.
Upgrade requests are made by waitlisting U class (when there are no seats available in that fare bucket), so whether there are 1 or 58 seats available in other revenue classes has no bearing on the matter.