It might already exist, I'm not sure... But couldn't we just have voice calls on Nostr? Individuals could input a minimum sats payment for others to call them. The payment friction would likely remove all spam.
The problem is that basically 2 people of my entire contact list is on Nostr. Would love to use alert or Nostr obviously, but the network is the problem rather than the tech in that regard.
That's fair. I have no one in my phone contact list on Nostr. Part of me wonders however, if removing spam calls is the "killer app" that would onboard new people.
Build more use cases and the network problem resolves itself. Networks increase exponentially
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