Have been working on a list of AI companies that train on user data: https://github.com/skiff-org/skiff-org.github.io/blob/main/b.... Will update the Zoom section but still suspect.
I think it's fine using "usage data", but the contents of a private conversation should be considered to be... private.
LLMs and generative image models have shown the ability to leak/reproduce training data. That's a big deal.