They make a tremendous amount of money producing and selling those components, and would not stop doing so unless they had to. And Apple has been diversifying their supplier base, giving fewer contracts to Samsung for manufacturing components. Finally, Samsung doesn't hold much in the way of legal cards. They are getting their butts kicked in every court these days, including in Korea. That's why they're at the table. Cook doesn't like the litigation, and he'll talk to Samsung all day long if they bring reasonable royalty payment concessions with them.