You would be _amazed_ at the things that people commit to email and similar.
Here's a Facebook one (leaked, not extracted by authorities): https://www.reuters.com/investigates/special-report/meta-ai-...
A smoking gun would be, for instance, Facebook observing that most of their ads are scam, that the cost of fixing this exceeds by far "the cost of any regulatory settlement involving scam ads.", and to conclude that the company’s leadership decided to act only in response to impending regulatory action.
https://www.reuters.com/investigations/meta-is-earning-fortu...