Show HN: Why Your Visitors Leave Without Buying

"Please don't use HN primarily for promotion. It's ok to post your own stuff part of the time, but the primary use of the site should be for curiosity."

https://news.ycombinator.com/showhn.html

"Off topic: blog posts, sign-up pages, newsletters, lists, and other reading material. Those can't be tried out, so can't be Show HNs. Make a regular submission instead."

Basically, if you engage with the HN community and follow guidelines, you are far more likely to get the attention you are seeking.