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AI Chatbots Turn Users’ Most Intimate Data Into a Potential Goldmine for Advertisers, Researchers Warn

Summary by EU Observer
Researchers found that even when users rejected non-essential cookies, Perplexity, DeepSeek, Gemini, Copilot, ChatGPT and Claude still connected to Google Ads.

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The titles of the conversations, the documents uploaded or even captures of the chats are sent to tracking networks for personalized advertising, detects a new study. European privacy authorities already analyze the findingsOpenAI left free to its AI to hack into governments and universities for months ChatGPT, Gemini, Claude, Grok, Perplexity and even the European Mistral. All these artificial intelligences filter data from the content of the c…

·Madrid, Spain
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ChatGPT, Claude, Gemini, Copilot and Grok use your default exchanges, except at Meta, where everything gets complicated.

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Eldiario.es broke the news in Madrid, Spain on Monday, September 28, 2026.
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