The lucrative market is for advertising placement which demands that you don’t sell the data that you have (otherwise the targetting that you provide is no long

The lucrative market is for advertising placement which demands that you don’t sell the data that you have (otherwise the targetting that you provide is no longer unique). Some company do sell the data they have behind the scene (Experian is one of them) but there are few buyers, those buyers can tell their data is of bad quality and they have competitors with similar data, so it is hardly lucrative. As far as I can tell, Apple’s efforts to make articles readable by removing JS-embeds a while ago, encrypt iMessage, fight the FBI about weakening their security or to fight against cross-site cookies more recently, all that seems both real and representative of how they value their product. I have not seen crowds ask for differential privacy and yet they spend precious time in their recent keynotes about it.