Some of the questions seem really stupid. ``Where did you register the domain name?'' seriously? How is that ever an issue. It could have been so much better if there had been a real interview. Lazy journalism?
Because HN readers aren't his target audience. Most people have no idea where to go to register a domain or host a site or how to evaluate different options.
Instead they chose based upon what other people have chosen. That's why he asks those questions.
Nice catch. Some of them appear to be affiliate links.
I also think his book has a few businesses like Yourmaninindia where he tells the reader to mention his name. He probably gets commission for that too.