New ask Hacker News story: Ask HN: How do I get people to find my pre-launch landing page?

Ask HN: How do I get people to find my pre-launch landing page?
7 by vuciv1 | 1 comments on Hacker News.
I see people note that they just leave it up and get hundreds of signups... Is this just survivorship bias? I've tried writing and sharing a blog post on it and I've tried grinding via social media, but have had little luck. Any advice?