The Last of Us has sold over 17 million copies as of April 2018

[BOLLOCKS]

Makes sense, since people like me bought it 3 times, lulz.

First time, pre-ordered PS3 Survival Edition.
Second time, pre-ordered on PS4 standard physical.
Third time, bought PS4 digital during a flash sale, for the multiplayer, so I wouldn't have to keep switching discs.