If the displayed advertisements are based on who's passing the kiosk, some very uncomfortable situations could be created - let's say a high-profile clergyman walks by and an Ashley-Madison advertisement is shown.
The ads are all anonymous and based on an aggregate on who is around the unit. It will never be a "Minority Report" type experience, more of a "55% of the users around this location are males, therefore a Draft Kings ad will play". One-to-many, not one-to-one.