MAC address tracking is one approach but it's imprecise and with the proliferation of "things with antennas," you have to do a lot of reconciling on the backend

MAC address tracking is one approach but it's imprecise and with the proliferation of "things with antennas," you have to do a lot of reconciling on the backend to not count 1 person as 3 when they have multiple devices on them. Euclid analytics tried this. It's a common but flawed approach to count (use depending).