I doubt this will really go anywhere. At the end of the day, it's actually in the EU's interest to make it easy and desirable for US megacorps to set themselves up there. €13B is nothing in the grand scheme of trade. That's why the EU are saying "should", not "must". It suits them to palm the heat off on a small country there, so most people can be sort of indignant about it but still feel like it's a foreign country's problem.