I just realized this can also be used for large scalable private groups and large scalable private feeds. you could do key rotation via gifwraps to send the new key to all the members if one is ever ...
I already did a nip on it a couple of weeks ago, almost exsctly similar mechanism, you can take a look:
https://github.com/nostr-protocol/nips/pull/2207
https://github.com/nostr-protocol/nips/pull/2207
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