Sure, milk whatever they have the political or economic clout to achieve. But I would say that the argument is even less favorable for them that Apple exerts a

Sure, milk whatever they have the political or economic clout to achieve. But I would say that the argument is even less favorable for them that Apple exerts an unfair monopoly over the outlets for them to publish their works. They have a world of ways to publish their content and simply want a bigger cut of this one. No principles about it.