It's fine to link to your own work occasionally, when it's particularly relevant, as part of a diverse mix of posts on unrelated things*. It's not ok to use HN primarily for promotion. See https://news.ycombinator.com/newsguidelines.html: "Please don't use HN primarily for promotion. It's ok to post your own stuff occasionally, but the primary use of the site should be for curiosity."
When people do that we eventually start penalizing their accounts and sites, or in egregious cases, banning them. You're a good HN user, but this is still excessive. You're crossing the line at which the community starts to think of the word 'spam', and we inevitably start getting emails about it.
* I do get that your work is particularly relevant in a thread like this. What's missing is the 'diverse mix of posts on unrelated things'. In such a context, posting repeatedly about your own stuff starts to come across the wrong way.