Here's the technical detail that everyone seems to be missing: IDFA is an Apple API.<p><a href="https://developer.apple.com/documentation/adsupport/asidentifiermanager/1614151-advertisingidentifier" rel="nofollow">https://developer.apple.com/documentation/adsupport/asidenti...</a><p>"The advertisingIdentifier is an alphanumeric string unique to each device, that you only use for advertising."<p>Apple created an API for advertisers that gives them a unique identifier, specifically for the purpose of tracking users. This has been available since iOS 6, released in 2012.<p>Shame, shame on advertisers for using the thing that Apple made for them to use!<p>If Apple cares so much about privacy, why did they make this in the first place? Where has Apple been for the past 8 years?