The post is pretty much just a summary, but I will post it here too.

Edit. HN is not letting me reply to people with questions (shaking small fist). If would like me to answer anything then post a question on my blog.

It will in a while. There is a delay (dead time) until a reply link appears which increases the deeper a comment is in a thread. This is to prevent particularily heated discussions where people just fire responses without thinking too much.

HN has a rate limiter for some posters (like me) that will not allow you to post at all after a certain number of posts/day