IDFA Sends All Zeros on iOS 10 Devices
A few months ago, Apple announced that iOS 10 will send all zeros for itsadvertisingIdentiferfield when the device’s user sets their limit ad tracking flag toON. According to Tenjin’s aggregate records, this represents ~15% of devices where IDFA will not be unique for a specific device. As I noted in my last post about cookies, the...