That's an interesting question, but it doesn't accurately describe the collection/transfer of data as far as FB or Google are concerned. Millions of websites/a

That's an interesting question, but it doesn't accurately describe the collection/transfer of data as far as FB or Google are concerned. Millions of websites/apps/stores willingly deliver this information to Facebook/Google for free, and it's your relationship with each of those websites/apps/stores that governs the collection and sharing of that data. GDPR, for instance, makes a distinction between "data controllers" and "data processors." The businesses are the controllers, and FB/Google are processors. Both have responsibilities regarding the handling of your data, but most of the requirements fall on the controller. The processors are able to assume that the controller had the right to share the data with them.