Instead, Amazon, Spotify, etc. simply steer me toward the more mainstream genre-media that I already know about.
Oh you like Grandaddy? You'll like the Pixies.
Oh you like the Pixies? You'll like Radiohead.
Oh you like the Radiohead? You'll like Nirvana.
Please, I want to go the opposite direction.
I have no affiliation or experience with either, just genuinely curious if you chose one over the other. Affiliate sales seems like a good fit for this kind of service.
Intersections are sourced from public ratings and reviews across the web. E.g. these books are all liked by one person so are can be made to intersect in the db - https://radicalreads.com/noname-favorite-books/
I got that recommendation too.
If you can do an Amazon/Audible integration, that would be awesome (and will let you build your recommendation system?).
From experience, I like to read the most populars/iconics books outside my perspective/pov, even though, if I had to grade them, it wouldn't be 5/5.
Maybe though, the most problematic of theses "ideological bubbles" is that people don't generally want to escape it.
How about a browser extension that tracks the articles, videos, discussion boards, HN threads, etc one reads and in real time suggests other anti-bubble ones?
Not sure if your engine would support it, but I'd use it.