The private key is encrypted to each p-tag in the event, so everyone that you share gains full access to the replaceable event without having to control any off-line storage for the key.
Having trouble using the system.
Opened in Brave, because that's the browser I have Alby installed on. Logged in with Extension. Clicked Create. I can see fields to add npubs for Viewers and Editors, but not much else. And when I add someone's npub as a co-editor, it doesn't really do anything.
I know, work in progress, but what am I missing?