Google Analytics sends URLs to Google on a even larger majority of websites. FB was hardly the one to start this trend.
The different in FB case, that they are not "required" to track URLs so they could of chosen an alternate implementation where sites in-directly served FB scripts through their own servers. And FB would only received a request when someone interacted with their elements.
The different in FB case, that they are not "required" to track URLs so they could of chosen an alternate implementation where sites in-directly served FB scripts through their own servers. And FB would only received a request when someone interacted with their elements.