I bet my biometric data is better than yours.
Yeah, I'm one of those people, not easily bothered by my personal info escaping like this. Not that I don't understand the feeling against personal info being grabbed by such devices and being used for whatever purpose, it's quite justified.
Also, what the blunderbuss could you possibly advertise to me based on my biometric data? Work-out equipment because I am quite lacking in muscle mass? Nonessential men's Hygine products because the black box says I am a man in my early 20's? The ideal ad setup for me is 20% retail LEGO ads, 40% gaming ads, and 40% non-retail LEGO ads, and I doubt you could figure that out from my heart-rate.