vinney on Nostr: The Arbiter and Patron proposal and acceptance events, and all the payments are all ...

The Arbiter and Patron proposal and acceptance events, and all the payments are all tracked via Nostr events so yes definitely available data.
And a project being successfully completed or rejected it also tracked via events - which would be good for reputation of the Free Agents who perform work.
Could definitely look into adding more feedback and rating mechanisms, I'd love for this to be synergistic with GrapeRank