Originally Posted by
IslandSkies
FWIW I purchased the buy-up to First for a flight three weeks ago. I paid about three days before travel and the new booking code was A. I got the RDM and PQM bonuses for the A booking code. IME if you purchase the buy-up within 24 hours of travel it books into R and no bonus is earned.
reason for referencing the thread is experiences seem to vary because the are multiple paid upgrade approaches and simple time windows don't seem to be enough to time for sure.