This is a pipe dream, you obviously want to see a more empowered internet and are fantasizing about ways to make it happen. Your base argument is that "big" websites should "give away" advertising space to registered political candidates. But you refuse to say anything about why they should do such a thing. Is it in their best interest? Is someone going to make them do it? If so, who? All in all it introduces an element of control to make it "fair." Why does the internet intrinsicly have to be "fair"? Why not just let it develop on it's own, and those who make the best use of it reap the benefits? Why should the internet be singled out for your grand plan of restoring your definition of "fairness" to politics?