End-to-end encryption isn't perfect, but it would at least make it considerably harder to track people on someone else's service - especially as compared to the

End-to-end encryption isn't perfect, but it would at least make it considerably harder to track people on someone else's service - especially as compared to the owner of the service. Plus, Google or Facebook can cross-correlate tons of different users behavior rather than narrowly spying on one single link (or several links, but still).