Tell HN: Gemini trains on chat history, even for subscribers (personal accounts)

Google's Gemini AI trains on chat history of personal accounts, even for subscribers, without an opt-out option, and may retain transcripts for human reviewers to read. To prevent this, users must turn off 'Keep activity' in Gemini's settings, which will delete chat sessions after 72 hours. This lack of transparency has led one user to feel betrayed by Google's paid subscription model.