"... a significant portion of the #Fediverse, at least for now, runs on pure enthusiasm, and sometimes on donations from supporters or some occasional banners. There’s currently no sustainable commercial model here, and it seems that there is no intention to implement one yet."

https://www.kaspersky.com/blog/what-is-fediverse/48916/

Why would we? A centralised revenue model for...

"... an association of independent social networks..."

...is basically like trying to create one for everything on the web. It's bananas.

The Fediverse: what is it, what’s it for, and how does it work?

What the Fediverse is, how it works, which protocols are used, what services are available to users right now, and its prospects.

^{Alanna Titterington (Kaspersky)}