Yes, AC would need to determine who is the more valuable customer. The SE/E U/G on a cert they have earned through loyal flying on AC, or the SE/E who is giving them money via an AP cert where the miles may have been earned through loyal AC flying or CC use?

Then, is the pax who charges lots on his CC but is a basic and buys the upgrade more valuable than the SE who wants the op up for free. From a revenue perspective the former will be more valuable in the short term, but the SE who does not get any op ups will get pi$$ed and fly with someone else.

Quite the conumdrum.