Looking at the OP's history over about the past year and a half, 100% of the submissions have been to his own sites and 100% of his comments are on those thread

Looking at the OP's history over about the past year and a half, 100% of the submissions have been to his own sites and 100% of his comments are on those threads or in one case linking to one of those sites. Your comment isn't the first one on these threads to point out the pattern, either, so it's very likely the mods have seen his pattern of using HN exclusively as a marketing channel and are okay with it.