I did a random sample of looking into them and a majority have no single post yet. Perhaps the major culprit could also be behind a few of the ranked up account the woke up on that same day
It seems like someone is flexing the size of their account farm. Possibly they are putting it up for sale. Acquiring accounts & keeping their passwords is one thing; actually putting them to use is another. There's no way they will be able to do their thing undetected, whether its promoting some shitcoin or joining bounties, they've already been caught.