[w3mmpp]

1. Most Americans use at least one of the "big 3" and since they all suffer from the same bias, I call it monopolistic.

2. Yes, I think this website (the users who react to the more political posts at least) penalize conservative views. It's not unique to HN of course, if anything it's better than the rest, but it's pretty obvious yes.

3. You compare some personalities that only reach those who are interested in what they have to say with big corps that are unavoidable on the internet and that editorialize every piece of information we're getting, from our news, the video we watch etc.