This is because in the United States, it is legal for website holders to share your data with third-parties without ever notifying you. The rampant abuse of you

This is because in the United States, it is legal for website holders to share your data with third-parties without ever notifying you. The rampant abuse of your privacy is made evident when you go somewhere that demands cookie consent. The US should pass a similar law and punish promiscuous data sharing forever. It should be difficult to access websites that auction your data for behavioral advertising.