thats kind of what I meant by it screws something up with the money. Just phony numbers here so dont take them as real. Lets say AS pays AA $300 a seat to Cancun. When it was AS metal lets say each seat was $300. The companion paid $99 so if AS didnt book the flight full and had empty seats they gained $201 as opposed to buying an AA seat for a $300 guaranteed loss
Now imagine that being a CX F seat.
Which is why there's no way in **** any airline would be dumb enough to give people the ability to buy two-for-one on another airline. BA, a much larger airline with an actual premium F product doesn't let you buy CX F seats with their two-fers in F.