> try and build a thriving decentralized media

This exists today, it has always existed, and you never needed technology to find the solution to it.

Im a huge fan of the film Rope, because it is just done well. Its also got a ton of coding in it for "homosexual" themes that were very much banned at the time of filming. Understanding these paints the film in a whole new way...

Shakespeare has a ton of contemporary satire coded into it. Unless you're aware of history or reading a version that illuminates the meta-context you would very much be unaware of its existence.

It happens in modern film: Paul Verhoeven is a master of it.

If you dont think there are coded communities on existing social platforms sharing information among in members I have news for you.