Kleros
Why is it better than kleros:
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PNK is prone to centralization, allowing wealthy to vote more, whereas BRN production is fair and decentralized.
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Outsourcing verification is not a good idea, especially if the project is meant to evolve democratically.
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Symbiotic relation between BRN and verification system. One strengthens the security of the other.
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BURST verification system could instead be the successor for Kleros.