FB had two levels of opt-out - first one for the users not consenting to provide their data to the app (a “cancel” button on the app permissions dialogue) and t

FB had two levels of opt-out - first one for the users not consenting to provide their data to the app (a “cancel” button on the app permissions dialogue) and the second one a global Facebook Platform opt-out when you wanted to prevent your friends from passing on same data. Equifax had none.