The name newbies refers to new members in the thread. But here maximum new accounts are created for old people for bounty. They do a signature campaign on the old account and do another bounty from the new account. Many newbie accounts are opened for scams or fraud. In the pain of all these accounts, those who are really new get lost.
Well, in something you are right. Old members start new accounts to increase their earnings. As long as it doesn't break the rules, nothing is forbidden. Many are practically hard to blame for having multiple alternative accounts, although most likely they exist.
But here the topic is about something else. And I very often meet with similar actions. New accounts, which are most likely controlled by some kind of bot, use other people's social media accounts. They only own the wallet address.
It has been verified many times that in fact, they do not get absolutely anything in this way. Since managers are clever at catching such cheaters. But the owners themselves, whose accounts are used by cheaters, are very worried, which I would not advise them. As described above, you can always prove who the real owner is.