User blog comment:JakePT/Galaxy at War Effects All Saves/@comment-1341687-20120126183948/@comment-3268946-20120127233818

It is more complicated than that. Assuming that it goes by the standard online XP system, as well as the "Readiness meter" or whatever its called that would mean that you would have to choose a profile basically every time you log in so as to ensure that the right profile gets it. Throw in the possibility of playing the MP before starting a game (those words seemed ridiculous even as I typed them) and the New Game+ feature that they are doing, the system just gets even more complicated.