We’re not talking about the case of individual users. If you have a monopoly position in one market, you cannot unfairly use it to give you an advantage in anot

We’re not talking about the case of individual users. If you have a monopoly position in one market, you cannot unfairly use it to give you an advantage in another market. Imagine if Google started delisting sites with Facebook Partner Network ads on them... The ease of switching is completely irrelevant.