> What measurement would you suggest we use to approximate the number of people whose communication is under the control of a particular organization
You'd first have to a establish a definition for the term "control".
> The average FB user spends 30-60 minutes on Facebook each day
Voluntarily interacting with an app for 45 minutes a day does not in any concevibile interpretation meet the definition of "control". The user is literally in complete control of the apps they interact with on their phone or computer.
You'd first have to a establish a definition for the term "control".
> The average FB user spends 30-60 minutes on Facebook each day
Voluntarily interacting with an app for 45 minutes a day does not in any concevibile interpretation meet the definition of "control". The user is literally in complete control of the apps they interact with on their phone or computer.