I’ve actually built and AGPLed my side gig, which correlates pretty closely to what you described here:

https://github.com/JonLatane/jonline

Personal/Demo server (links to/includes data from the other two servers automatically): https://jonline.io

Servers for Durham, NC and Raleigh, NC (link to each other only): https://bullcity.social and https://oakcity.social

But um… how make money with it? I’m paying $60/mo for these 3 servers (and can bring it down to $40), and really stuck on how to monetize and get people using it.