You are certainly welcome to run your own brainstorm instance! The repo is here [1], and also linked from the brainstorm instance in my bio. If you decide to run one, let me know - I’ve made some recent changes that are not all in the docs yet. Or if you just want to see how it works, sign up at my brainstorm and I’ll calculate your Grapevine. Currently, you can use personalized metrics at Relay Tools. I’m making metrics available throughout nostr using @Vitor Pamplona's Trusted Assertions NIP. Currently TAs are only adopted experimentally (cc @vinney...axkl ), but TA integration is not terribly complicated — all a client has to do to access Alice’s metrics from the perspective of Bob’s WoT is to pull up the corresponding 30382 note — so my focus now is getting TA integration into a handful of clients.
[1] 
GitHub
GitHub - Pretty-Good-Freedom-Tech/brainstorm: a personalized Webs of Trust nostr relay featuring the Grapevine
a personalized Webs of Trust nostr relay featuring the Grapevine - Pretty-Good-Freedom-Tech/brainstorm