I was flying out of Seoul last night on in an overbooked Economy Class flight with 7 Seats left in Premium Economy. I asked at the Check in for an Upgrade to Premium Economy but they refused as the Emerald Status is to low because they Upgrade all Marco Polo Members Tier members incl diamond / Gold and for my surprise Silver before they Upgrade the OW Emerald. The supervisor showed me the upgrade procedure in her system as I could not understand that they preferred their MP silver before OW Emerald. It’s comparable to the bronze status of BA. Does anybody know how the procedures are within BA or other OW member or is it just a Cathay case? Anyway flight was really great also in Eco on an A350 aircraft with emergency exit seats and 2 champagnes from the puser.