I would assume at this point that any SaaS product, LLM or not, where the data doesn't reside on your servers on your premises (or your own colo) is training on

I would assume at this point that any SaaS product, LLM or not, where the data doesn't reside on your servers on your premises (or your own colo) is training on the entire corpus of your data, whether they'll admit to it or not.