Ah. Well then maybe some of the costs, such as ground handling, and the lounge, I guess they're maintained through shared funds or something?
Well I dont see how they could of maintained all of those amenities without having someone pay for it. I could be wrong but maybe they are charging the airline in the region (so for the SkyTeam terminal in CDG AF will pay for it, and in JFK Delta would) or maybe they charge to be in the alliance.