I am glad you’re skeptical! Which is why brainstorm is open source. You can run your own Brainstorm instance and calculate your own Grapevine (your personalized trust metrics) yourself! I’d love for everyone to do that. But realistically, that won’t happen - well, maybe it will eventually, when it gets slick and easy. But for now it still takes some effort, like running a nostr relay, and not everyone will want to make the effort. Which is why your Brainstorm instance can calculate personalized scores not only for you, but also for your friends, family, community, and/or customers.