Allowing tons of third parties to access all your data. That’s for sure going to solve all the problems (and Facebook had same idea few years ago, that brought you Cambridge Analytica scandal)
The problem with Analytica is it was done without your knowledge as a user. If you had volunteered to share tour data with CA how is that is that different from sharing it with Google or Instagram or any other service? We pick services to use in exchange for data everyday.
Why is it different if Facebook has access to your data from any other service? You just pick one.
Anyway this is the only solution and it will eventually be implemented. Either that or the Warren plan.
User A uses app X and shares data with user B. User B uses app Y. App Y is scraping data. They now have data of both user B (which expressed consent) and user A (which didn’t). It’s exactly like Cambridge Analitica.
Same as windows - you just force them to have an anti-monopoly function.
Alternatively, allow for other ad suppliers to work through their network with a minimal amount of friction. Then you annihilate their revenue.