I had an itinerary (AUS MegaDo) where I applied an RPU for AUS-IAH-BOS. AUS-IAH of course cleared immediately, IAH-BOS waitlisted and didn't clear. This morning I was offered an upgrade of the second leg for $399. Declined it of course, and never cleared. Is there something wrong with this picture? and/or is this what I am likely to expect for the future?