Why even allow a "Paid For By" as an option to everyone. I imagine for all senators, Facebook has an ad rep that has been assigned to their media strategy team

Why even allow a "Paid For By" as an option to everyone. I imagine for all senators, Facebook has an ad rep that has been assigned to their media strategy team. That rep could then assign a user or group of users that are known ad buyers for the senator and flip a switch in the background that adds the "Paid For By" message.