Are you sure there is any difference? We can talk theory as much as you want and the theoretical differences to exist, but in pratice, that's a different ball game. Theoretical privacy gets broken when it meets real word needs.. our zaps unfortunatelly fell for that and there is no way back.

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You know that we have people here whose sole purpose is to store those kinds from every possible relay they can reach and sell later to data processing companies right? Just to be sure... We are so good at this that we even created a private market for Nostr data. There is a monetary incentive to keep certain events, especially those that people delete later. Those get some premium value in the market.
The gap between protocol-level privacy and real-world behavior is where most systems break. Zaps are a perfect case study — the UX demands of 'show me who zapped' directly collided with privacy ideals. We optimized for adoption, not anonymity, and now the data exhaust is permanent.