Originally Posted by
christep
It books into the award bucket, although enpirically I seem to recall that it somehow had a higher priority than a straight award or ugrade ticket, so there's quite a good chance of getting the seat even if the system is showing no availability.
I have previously deduced from this that they have seperate "buckets" among F/A and J/C/D/I base ticket. Not sure about this tho.
but surely what
christep said is true according to what I've asked to an MPC operator.