How AI Companies Train on Your Data: The Prompt Harvesting Economy

TL;DR: Every conversation you have with a free AI tool is, by default, a training data contribution — your medical questions, legal troubles, relationship confessions, and proprietary code feeding the behavioral surplus machine that makes these companies valuable. Enterprise customers pay $25–50 per user per month to opt out of this arrangement by default, proving that privacy is commercially viable — it's simply not offered to consumers for free. A technical solution exists: prompt scrubbing and privacy proxies that sanitize your inputs before they reach any provider. What You Need To Know OpenAI's ChatGPT free tier uses conversations to train future models by default; the opt-out toggle — Settings > Data Controls > "Improve the model for everyone" — is known to fewer than 0.5% of eligible users who actually disable it In April 2023, Samsung engineers leaked proprietary semiconductor designs, internal source code, and meeting notes via ChatGPT prompts in three separate incidents withi