The fact that this won't go "web scale" seems to be its strength. The idea of local/human/authentic trust ecosystems is super powerful. "Proof of personhood" is

The fact that this won't go "web scale" seems to be its strength. The idea of local/human/authentic trust ecosystems is super powerful. "Proof of personhood" is fraught with issues, but it seems that lightweight trust algos like this do a nice job of treating trust as a human-first emergent thing, rather than trying to be a PKI style "infrastructure". Pretty cool!