If one is traveling A-B-C and at the time of purchase they waitlist for an upgrade with an RPU (or a GPU), what happens if only the A-B or the B-C segment clears in advance of the departure day? Will they be informed that they aren't getting the upgrade for both segments, but they can have it for one of them, and if that happens? It isn't an all-or-none proposition, is it? If they are confirmed before flight time on the short hop part of the travel but remain waitlisted on the long haul part, can they wait until flight time to see what unfolds rather than accept or reject the short hop upgrade when they are first advised of it?
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