Wu said that according to cybercrime intelligence company Hudson Rock, the data of 400 million Twitter users is being sold on the black market, including emails and phone numbers of well-known users such as AOC, Kevin O'Leary, Vitalik Buterin, etc. Hudson Rock said that although it is impossible to fully verify the hacker's claims given the number of accounts, it said that "independent verification of the data itself appears to be legitimate."