Originally Posted by
YYCYYZ
Because they're part of an alliance, and because a lot of people have travel that isn't domestic/easy international like yours.
You are already getting alliance benefits - *G and alliance wide mileage earning. What you are losing out on is AC benefits. And since you don't fly enough AC, AC is saying they don't want to give you the AC benefits.
Sounds like a solid business argument for AC to me.