Article 50 of the EU AI Act requires an AI system to disclose that a person is talking to a machine. It says nothing about what happens to that conversation once the disclosure is made. Founders building products on top of a foundation model focus on accuracy and price. The question of what happens to their users’ data once it leaves their product and is processed by a third-party model rarely comes up during vendor selection. The rule became enforceable on August 2, 2026, and fines for…