## The Face is the New Cookie
When a billboard looks back at you, it sees more than a person. It sees a specific level of dopamine or cortisol. This tool models 'Sentiment Auctioning.'
### FAQ
**Q: Is it legal to track my heart rate via a billboard?**
A: In many public jurisdictions, 'facial observation' is legal. If the billboard can detect your pulse via skin micro-color changes (photoplethysmography), it can determine if you are hungry, angry, or excited. Advertisers pay 45% more to show a burger ad to a person whose biometrics indicate hunger. You are being auctioned to the highest bidder based on your internal biology, in real-time.