farcaster should implement subscriptions to accounts you follow

allowing for exclusive subscirber posts (like twitter/X) AND subscriber chats (like friend tech)

subscription is token model that you have to pay monthly, and can trade on open market

could use eip-4885 or eip-5643 style models

just a thought

This sort of gated content over a P2P network isn’t a simple thing.

You have to encrypt the casts, and only subs can decrypt. You want to avoid making an encrypted cast for each user.

https://github.com/Hmac512/broadcast-encryption-boneh

This is the sort of thing broadcast encryption was made for baby.