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.
Thank you, I wasn't aware. Should I redo it somehow?
Just repost it without the Show HN.
HN redirects to this post when I repost it, seems they check the URL. I'll keep it in mind in the future.