This kids have great knowledge to conduct this level of hacking. Also being a platform as Twitter, we would think that they are advancing towards security, but there is always someone that is more clever.
That said, Money is the root of this problem. If they are the ones who did it, they will repent the action, because they hacked big accounts and so, they will probably lose their teen years in jail. They could have used this knowledge for ethical hacking, instead of this!