I'm building this whole platform with tens of thousands of lines of code, which (in my opinion) is pretty unique, I use it every day with a couple of people that visit, but it's designed to handle much more. I'm not getting anything in terms of money out of it, if anything I'm losing money by hosting and stuff. I'll leave the link here: https://github.com/madprops/Hue . Also there's other successful open source solutions that are having a big impact right now, like Mastodon, it's a very active Twitter alternative: https://en.wikipedia.org/wiki/Mastodon_(software)