I believe we should push for legislation that prohibits the sale of customer data to third parties. Websites can use the data on their customers but they cannot share it with anyone else. Because aggregators are selling it cross-border after which you lose track and all control over it.

They shouldn't be able to collect it in the first place. The big companies have 10 page agreements that say they "value" your privacy and that they don't sell your data to third parties. They do value it, highly. And they don't sell it--they just hoard it, mine it, and sell increasingly accurate targeting. Why would they give it up? I mean, besides coughing it up with little objection to national security letters.

This would kill some middling parties but wouldn't do mich.

I worked for a major adtech company that bought zero third party data.

There's enough in the bidrequests.

And we had nothing on Meta or Google's ecosystems.

100% agree. There are a million reasons people come up with for why this will never happen, but pardon me if I want to see us try first and then fix the mistakes we made after. Right now we're living in one big dystopian mistake that needs immediate pushback.

Look at the outrage from US tech bros when the EU passed a law saying that you only had to tell people you were going to do this. Imagine how preventing it would be received.