I'm wondering if enforcing this on the browser level wouldn't make more sense. I mean, if a site use cookies or wants to track you in any other ways it would have to ask for your permission the same way you are asked before accessing your camera or microphone. You could opt-in or opt-out which should be the default if you don't make any choice. Then the sites would have to clearly stop you from accessing their content if you didn't opt-in, the same way you are stopped with paywalls. I think this would be much more transparent if we really want to teach people that they can pay for the content either with their money or their data. Of course another choice would be to just avoid these sites whatsoever.