Literally, at work (a startup), we use Traefik (which is horrible imho) instead of nginx (which I've used literally everywhere else) because the devs who originally started this project had never used it on a personal project.
So the issue isn't paying for it, it is about making it useful enough for personal projects that people use it for personal projects that it then gets used on professional projects. Right now, it is barely useful for personal projects unless you know what you're doing.