Just as bad, and then some. The big ones used to only have B2B power with vendor lock-in. The new ones have much more. They have power over their individual users, too, by locking in their data and controlling the communication and sharing with others, and trough that even over people who are not their customers yet. You want to communicate/share with person X? Looks like you have to have an account at Y for that, too bad, eh?