It is unclear who the buyer is and what they intend to do with the data.
Earlier this week The Witcher developer CD Projekt Red had been hacked and that the hackers were trying to extort money from the company in order not to release large amounts of source code and internal administration documents.
CD Projekt Red themselves speaks about the hack and said at the time that they did not intend to give in to the extortion attempt. They also said that there was no indication that the hackers had come across any information concerning customers or players.
Now The Verge reports that the hackers, according to the cyber security company Kela, have resold the stolen data. Initially, the data will be put up for auction but then sold to a party outside the auction. It is unclear who bought the stolen material and what they intend to do with it.