Sorry if this is off thread…
I will use EuroBonus miles to upgrade to Business Class on PVG-CPH (operated by SK) on an upcoming flight in May. I have switched to Aeroplan this year and will hit 35k with this trip. If I were to credit my miles to EuroBonus I know that I wouldn’t get any extra bonus for my upgrade (just the miles for Y). But will Aeroplan see this as a J class ticket and credit COS bonus to my account?