> Prior to ATT, every app by default had access to your advertising ID, i.e. it was opt-in by default. Nitpicking, it was not opt in, as the user did not opt i

> Prior to ATT, every app by default had access to your advertising ID, i.e. it was opt-in by default. Nitpicking, it was not opt in, as the user did not opt in. It would be more accurate to say: "consent was implicit", or even "the app could access the user's advertising ID without the user's consent". I feel that it's important to distinguish "opt in" as something that requires explicit user action.