there were court cases around this very thing and google and webarchive. I suspect thier legal team is expecting similar precedent with the issue being down to the individual and how they use the index, example, using it to make my own unique character (easily done) vs making an easy and obvious rip off of a Disney property. The same tests can be applied, the question IMO isn’t about the index that is built here. I can memorize a lot (some people have actual eidetic memory) and synthesize it too which is protected and I can copyright my own mental outputs. The disposition of this type of output vs mechanical outputs i expect will be where things end up being argued.

I’m not going to say I’m 100% right here, we are in a strange timeline but there is precedent for what OAI is doing IMO.