> That's very defeatist. Do you have any concrete reason to think the major providers are lying to every one of their business/API customers about not training or storing the data? The business loss of trust would outweigh any benefits of the data.

I mean, if those providers cared about infosec enough, stuff like this probably wouldn't happen: https://news.ycombinator.com/item?id=48877371

At the same time if I was one of those large orgs and was running out of training data and falling behind the competitors, I'd probably have to stretch every definition under the sun, like what counts as "metadata". From a zero sum game perspective, it doesn't make that much sense for them NOT to train on your data if the consequences upon (non-guaranteed) discovery seem largely inconsequential when everyone just wants the best model regardless.