For example Ben is relying on his "aggregator theory" to explain Trump, but I don't see how it applies. Trump is not spending resources on any of the big tech aggregators, and he is not trying to go around the media. In fact he is by far the most media-reliant candidate in the race. People find information about Trump on Facebook not because Trump is working Facebook's levers, but because so many news stories are written about him! He is infiltrating tech platforms via the media.
Yes he is a heavy user of Twitter. But we've seen countless articles here on HN about the stagnant state of Twitter as a social network. But guess who still loves Twitter and uses it heavily: the media. Trump is on Twitter because that's where the reporters are.
I'm not going to try to explain Trump's success. No one can, except maybe Trump. But I do know that the Internet / media structure today is not a sufficient explanation. Why? Because a) all the candidates exist in the same tech/media environment, and b) the tech/media environment in 2016 is not substantially different from 2012, when the GOP went establishment yet again.
Now maybe Ben would say that Trump has seized the opportunity much better than the other candidates. But that is functionally the same as saying that Trump is an extraordinary candidate--which, while unsatisfying as an explanation, is right.
Edit: for clarity