Anthropic should think hard about all their fear mongering. It will only end up backfiring on them and everyone else involved.
They definitely used closed private saas products to train their own models, to prove that just drop random small screenshots of any popular product behind a login screen and see how well it's able to identify all of them. ex: https://x.com/michalwols/status/2079968211865330165
or other similar "AI" startups https://x.com/envconfig/status/2079613455296827402