The PSN account, which is free, was required but turned off during launch. It's been working fine. Now if you don't link your PSN to steam you can't play after the end of this month. You lose a PC game on steam because you don't have a PlayStation Network account.
It's totally unnecessary and Sony has a shit cyber security track record.
Sony has shot the game developer in the face with this.
Don't buy sharpies, they sent cuntmp that stupid giant one. Buy better.