It’s also a system setting whether you allow an app to use IDFA - which according to at least FB - 80% of iOS users decline.
>In iOS 10, Apple introduced "Limit Ad Tracking" setting for users who do not wish to be tracked by advertising networks. If the setting is enabled the system returns a default all-zero id for that device. As of December 2020, it's estimated that approximately 20% of users turn on this setting.
On iOS you can go to “Location” and Reddit doesn’t show up as even an option.
And you cited an article about iOS 10 that came out in 2017. As of 2021, it’s 88% that opt out of tracking
https://targetinternet.com/resources/how-apple-ios14-changes...