This makes sense in principle, but I'm seeing a bunch of legal/technical/transparency issues on selecting the third party over the globe. The root problem is a

This makes sense in principle, but I'm seeing a bunch of legal/technical/transparency issues on selecting the third party over the globe. The root problem is a trust issue and I still don't see how Google can convince bidders that the auction is run by some entities which won't do any (implicitly) good for Google in return of selecting them, especially Google still owns a full control on picking the "third party". This can be solved if a state picks the third party, but now we have even bigger problems; you will have to enforce the same policy on most of the platform holders with similar issues (virtually every single major tech firms)