Better fit is one thing, but more feed always translates into more dollars. LH has invested in a large operation out of JFK that cannot be easily shifted to EWR, and also while the catchment areas of JFK and EWR overlap, they are also substantially different and complementary. Thus simply because CO were to join *A (which might never happen or might not happen for a long time) does not entail LH limiting or reducing the scope of its cooperation with B6.