Originally Posted by
CanucksHKG
One possible possibility could be your gf's seat was originally beside a DM / baby / elder / etc. And that party wish to be seated together with another pax, thus needing her seat.
Since your gf was travelling as a single pax, it was easier to move her around. At the same time, CX does not want to anger anyone by reseating her to a random Y seat. So since there was an availability in PEY - they chose to just op up her.
Exactly. Although we tend to view op-ups as a frequent flyer benefit, and CX does make some effort to prioritize on that basis, don't forget that the "op" is short for "operational." At the end of the day, CX will upgrade who they need to in order to accommodate a range of requests from pax, simplify life for the ground crew and get the flight out on time.