I did address both the OP's 1) pseudonym (anonymity) and 2) by-works, the other two points (patronage and audience relationship + API) are both viable and already very much present in crypto art communities.
The real feature of crypto is decentralization, which does not need to mean fraud—in the same way that end-to-end encryption does not only facilitate criminal behaviour.
The real feature of crypto is decentralization, which does not need to mean fraud—in the same way that end-to-end encryption does not only facilitate criminal behaviour.