What do you think about this "Paywall Posts" idea? https://nostr.band/note1rjkuf50d2ks6q64t6gvduzx5rwmteaxztz3u8ldyljz24xnmyh7qw4q9xc Users can add a "paywall" attribute to a regular post. The relay only displays the contents of the "paywall" attribute, if the requesting pubkey has zapped the post.