Thanks for the link, although I don't see anything that addresses my previous post.
My impression from talking to Tim and reading Sirius' whitepaper from a few years ago is that nobody associated with identifi has put forth a vision to tackle the kind of problem in my previous post. In other words, how identifi could provide the foundation for a fully formed pseudonymous reputation system (PRS). Although I would be happy to be proven wrong!
This to me is the most interesting problem in the crypto space. I have ideas on potential strategies and am working on demonstrating those ideas on my website OpenBazaar.OnTheBlockchain.com which I hope will provide a useful reputation system for OpenBazaar. It is not yet in beta although I hope that's not too far away. Essentially what I am building now is a platform that will calculate average ratings of listings using ratings generated on my site as well as ratings generated on OpenBazaar itself, and will also calculate trust scores of users based on ratings generated on my site. All averages are weighted averages, where the weight of the rating depends on the trust score of the user doing the rating. Unvetted users are given a default trust score which is adjustable by the user and can be set to zero if desired.
I haven't done this yet, but my roadmap includes allowing users to sign json-formatted ratings using a self sovereign identity (like a keybase ID perhaps), and then storing the rating + signature on the ipfs. I haven't learned enough yet about identifi to know whether I could use the identifi library to assist me in this task. Although by a quick perusal, it looks like identifi has functions that will store data in ipfs, so perhaps I can use it.