Same with Fly.io, SQLite, Hetzner, etc. Hackernews is a pretty effective way to advertise to developers.
They tend to show up as submissions mostly when something bad happens (e.g. price increase), but they still show up in comments a lot when people discuss how comically expensive cloud providers are in a direct comparison and how you can be similarly effective running on such pricing-focused hosts, especially if you know how to build the redundancy yourself (or don't need it).