Originally Posted by
anabolism
Are you sure? My impression was that LFBUs were offered when more seats were available than needed for elite/mileage upgrades, while advertised upgrades were often done in an oversold situation, and also that LFBUs were kiosk-only, for both domestic and international flights, while advertised upgrades were out-station only (for flights to the U.S.).
What you are calling an "advertised upgrade" is, in fact, an LFBU. The method of offering it is different. AA has not told us when they offer these and when they do not, so all we have is a (very limited) set of data points.
Originally Posted by
anabolism
But an op-up or other upgrade during irrops is very different from a kiosk or advertised upgrade.
That is my point. IRROPS is the only situation that I know of where the double-upgrade occurs.