According to Foresight News, Vitalik tweeted in response to a comment: "Technically, any currency is permissioned: you need permission from an existing holder to become a holder. This shows that there is actually a continuous trade-off between the permission levels of Apecoin and ZuVillage. We can imagine an intermediate structure: becoming a member requires permission from multiple existing members, but it is still very open. For example, you can imagine a quadratic financing style mechanism weighted by existing member points to accumulate member points. This is what I hope to see in OP Citizens' Home, Zuzalu Community, and other DAOs that are being experimented with. Formalizing and measuring membership is upstream of any formalized governance. It would be really cool if there were more ways to obtain formal membership that is highly decentralized and permissionless, but at the same time not just token holdings."