In the #Fediforum today, we've been talking about how to monetize Fediverse content. I have talked about a rough outline for how to do it before -- setting up a private account, enabling out-of-band payment, and approving followers based on payment.
As a proof of concept, I've set up a premium account on my personal server. @evanplus is a subscription only private account (separate from my friends-and-family account) where I will post content I think is worth paying for.