so what’s the question

why not put it to productive use ?

Well if there is a need/purpose, by all means, go ahead!

what is self hosting ?

cut-n-paste from wikipedia : Self-hosting is the practice of running and maintaining a website or service, as well as own servers for e-mail, IM, NTP and so on, using a private server, instead of using a service outside of the administrator’s own control. Self-hosting allows users to have more control over their data, privacy, and computing infrastructure, as well as potentially saving costs and improving skills.