[curiousmindz]

Sadly, most publishers are not interested in developing their own proxy solution just for the sake of data privacy. They vastly prefer a ready-made solution that they can just use.

Much of the power of the advertising space come from people (publishers, consumers and advertisers) generally choosing the path of least resistance. They don't have the technical know-how and they would only acquire it if there were enough benefits. Sadly, privacy is not enough on its own.

I think the solution that can solve all that is when a company acts as a "wall" between consumers and publishers/advertisers. Then, that company can protect the consumer while keeping the user experience as simple as possible.

"Sign in with Apple" is one such solution. But of course, it brings its own (different) downsides.