Fiat money operates on a platform.

Twitter operates on a platform.

#Bitcoin operates on a protocol.

#Nostr operates on a protocol.

Money & Speech are social constructs, established through emergent consensus to facilitate voluntary open exchange. When arrogating these constructs on a centralized platform, the emergent consensus idiosyncrasy departs and the state of the construct alters. This alteration in essence is a hard fork and the value proposition of the original construct becomes non existent.