> what makes Facebook special in this chain Responsibility should be proportional to profit. I am not even sure Facebook is the most profitable link in this ch

> what makes Facebook special in this chain Responsibility should be proportional to profit. I am not even sure Facebook is the most profitable link in this chain, but it probably is. > Is it just a matter of practicality because Facebook is the single point of failure in that chain that can not be bypassed And they have the best capability for that reason.