Does anyone know if it specifically has to be on UA 016 stock? Presumably it does, because otherwise there's no way UA will be able to see what payment method was used, right?
I'm looking at booking something that's:
US-CA, 1 segment, UA metal, AC codeshare/flight number, AC stock, paid for with my Explorer card.
I'm guessing that I won't get a bag waiver in this case?
Update:
Well, I ended up booking it (ticketed on 014 stock) and UA's site shows 1 bag for the first 2 pax as included. We'll see what actually happens at the airport, I guess.