It's been restricted. https://news.ycombinator.com/item?id=47300329 Too many people create an account to post a 'Show HN', then never come back, often don't even reply to comments/feedback. LLM/AI use has made it worse. The community struggles with 20 Show HN submissions per hour.

> isn't able to submit this site

I haven't seen this error message before. It looks like "this site" was submitted before?