Yes I think nostr:npub1mutnyacc9uc4t5mmxvpprwsauj5p2qxq95v4a9j0jxl8wnkfvuyque23vg lets you autorenew without manual action. Correct me if I’m wrong. I need to test again.
Yes indeed regarding forked clients. It’s very possible that there may be a model where you can just opt in or opt out of various features in the “parent” client. Basically whitelisted version of the client to fit a specific brand or requirements. This has been largely unexplored.