Just another Idea comes to my mind for nostr clients showing npub profile pages.
Account age.
Showing the age of the npub first signed note.
#idea #nostrDevs
Discussion
You can see profile age in nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg (I don't think it's from first note though, I could be wrong) 🤷♀️