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

Google AI's Gemini large model uses personal subscription users' chat history for training, unless chat history is turned off or temporary chat is used, it cannot be exited; this chat history may even be manually reviewed, but Google claims it will be disconnected from the account after review, and explicitly warns not to enter confidential information; users can prohibit its training chat history by turning off the 'Keep Activity' feature in Gemini settings, but this will cause chat sessions after 72 hours to be lost