Do you do marketing as well? I'd assume not based on the no JS-analytics so I'm curious what your customer acquisition methods are, as in how they find out about your business?
Author here, I think most new signups are through traffic from search engines and through word of mouth, Healthchecks.io gets regular mentions in Reddit /r/selfhosted. I've dabbled with paid ads (Google search, Reddit, Twitter, EthicalAds) but without analytics it was shooting in the dark.
We're all here on the front page of Hacker News :)