Originally Posted by
AX9465
it is not automatic and decision is made by each program on a combination of many factors as well as bilateral relations between different airlines, otherwise earning rates throughout the alliances will be harmonized long ago.
if you ask me, I would do the same way as A3 - give more points to C and F in exchange of giving less to discounted Y. that will help keeping their non-flying membership containing of people they receive highest compensation for when they receive credits from other *A airlines.
AX
You're right, and C and F flyers have a tendancy to avoid flying in the back of the plane. I am pretty sure I am not alone in thinking like that, even if not everyone has an extreme viewpoint on the question. Those who fly premium cabins often when they get their shiny card will continue flying mostly premium cabin... Hence no need to pay for their lounge access on flight, because they'd have lounge access anyway.