Nostr will fix the problems of bad reviews via proof-of-tx Sybil resistance with rakes taken by relays, a bit like how StackerNews reputation works.

Look up relational contracts.

My hypothesis: nostr brings fungibility to counterparties in relational contracting so you may able to trust people based on relationships with other people almost as if that relationship had been with you the entire time.

This panning out also makes the notion of a zero government cryptoanarchic world seem vastly more plausible.