And so expect a lot of scams in the following months if this data goes to the wrong hand. And it seems they are also toying with Elon Musk, asking him 276 million in return, sort of ransom and if he pays, they are allegedly going to delete the data (but I doubt both parties are going to do it).
I suspect that the hack though happen prior to Elon taking over Twitter, and perhaps the cyber criminals again, wants to troll Elon Musk for releasing his supposedly hack accounts and sell it and have someone independently verify at least 1000 accounts.