As to whether the size of some of these large social media companies gives them too much power, I would just respond that, yes, data is power, and they are quite powerful, but that power is somewhat tenuous. They are vulnerable, because the power is rooted in consumers' confidence in them. If there were a major breach or some kind of thing that caused harm to a group of citizens, or even down to a single individual, and they suffered a lot of negative publicity and damage to their corporate reputation, I think they would be dramatically diminished quite quickly.
