Yea, I mean if this were a paid service with full ActivityPub and OStatus support (and could interact with Mastodon, Plemore, GNU Social, et. al.) then that wou

Yea, I mean if this were a paid service with full ActivityPub and OStatus support (and could interact with Mastodon, Plemore, GNU Social, et. al.) then that would be something different. But a $5 a month, non-open source, closed, siloed system? I'd recommend going back to the drawing board and use more off-the-shelf stuff. Create a payment gateway to setup and maintain a Mastodon or Plemore instance, with a backend that automatically sets up the domain and handles software updates. Yes, there are other services which do this, but there is plenty of room to do it better. Creating a new micro-twitter is pretty much a non-starter at this point.