There must be some type of rating because you are asked to rate coordinator after a trade. Maybe koalasat can give some insight. I have seen them post about robosats and coordinators and discussed nostr reviews. nostr:nevent1qqsznrurv6cms4nmgtjdy2udwz0lfd5mhu0zsdr20f627r3xumhh75qppemhxue69uhkummn9ekx7mp0qgsxg45ph8gx0vdrvtzta6xal7v86frx6jvstsnvhrlvtehmwwh4epqrqsqqqqqp6ldaya