In some cases, it's probably to establish aged accounts that are more trusted by users and spam algorithms. There's a market for old Reddit accounts, for example.
Yep. Like I said elsewhere on the thread, some of them already have enough karma to downvote.
Interesting.
Incidentally, how much do they pay for a HN account that is a few years old and accumulated a few thousand Internet points?
Asking for a friend.
Yup, reddit is awash in established accounts that suddenly start spamming. Whole pools of them working to the same goal at times.