I'm currently running a job board without ads or any ways to make revenue. I see this as a way to learn things - adding one layer of complexity at a time to see how far I can push it and learn things.
I have noticed that I like to learn things by doing so that's the goal. Not exactly a monetary thing but rather investing in myself.
Right now, I'm looking at splitting the server to host at multiple locations so I can improve latency via Geo DNS.