Since in Nostr we don't collect emails on signup, I like the idea of opting into subscribed notifications in DMs or in the notifications field.

This creates another loop within products and allows you to keep on top of content you may have otherwise missed.

Come to think of it, perhaps a new tab in DMs would be nice. Call it "Subscribed" or something. Then no matter which client you're in, as long as that's supported you can see a summary of content you have subscribed to.

I still think there should be a way to plug in an email, even a throwaway to get subscribed content that way as a lot of people still handle to-dos via email. I think that would be a great way to onboard from outside of nostr.