The Verge:

Frequent flyer programs are a frustrating paradox. As humans, we’re always on the hunt for a discount, but how often do most of us fly? Once every few months? Once a year? For the most part, we spend far more time traveling in a car or bus, on a bike, or on foot. To the right kind of mind, that sounds like an opportunity, which is why a new Silicon Valley startup called Miles has built a rewards program for all these other modes of transportation. The cost? You have to let Miles follow you everywhere.

Too damn creepy for my tastes.