Ask HN: How do you grow your SaaS business on Hacker News?

Create a bot that monitors raising HN posts. If you see it's a personal blog, message the person ASAP with an ad offer. If he agrees pay him and you get super targeted ad

I would look at Backblaze and Cloudflare as firms that publish blog entries that do well on HN.

Quality content marketing and thoughtful comments. Also consider your target audience and that which dominates HN, is there alignment?

In general, Show HNs are a good choice. Other marketing is not appreciated and will often just get downvoted.