Yup, the article also says:
> My guess would have to be it’s some worm that resets the accounts it hacked into to it.
> My guess would have to be it’s some worm that resets the accounts it hacked into to it.
Edit: Thinking about his explanation, it doesn't really make sense to me. If that were really the case, those accounts would be more evenly distributed through the list - yet they are tightly clustered, which leads me to think they were created in groups (guessing the list has some sort of chronological order).
Where are you looking at the clustering?