Ask HN: How do I get traffic and distribution for my app cheaply?

We built a SaaS. There are enough competition and people are making millions in our vertical. We confirmed demand and have sold subset of features and made probably $500. However, our website and app have no almost traffic. The money we made was from single platform that has shutdown now. So we dont have distribution. I am posting on LinkedIn and have started blogs. But, it will take time to capture traffic with blogs. I dont know but it could be 6-12 month game based on what I have read. What can I do to bring much more traffic and increase distribution of our web app? I have tried Show HN but my app had no comments. HN is likely not a good audience anyway. I can spend probably $300/month on Google Ads but that does not lead to massive traffic and often we get people from third world countries and freeloaders who never buy. I never made money from someone subscribing to our app using Google Ads in the past. I reached out to some creators on X and got quoted $3k, $5k or $10k per post. I did not realize prices are these high when we are not even not sure whether X is mostly bots. I have read $200 - $500 per mention from newtubers but again that is very expensive for someone like us who sells $20/month SaaS. How are people who are not part of networks like YC or not funded by venture capital doing it? Unfortunately I dont have much following on LinkedIn (all engineers who never buy) and our company, being new, also dont have much following on X (10-20 followers only). What do you suggest that helps us bring traffic, distribution and ultimately leads to purchase?