Quote from this article: "MPAA and its international counterpart, the Motion Picture Association (MPA), claim that the U.S. film industry loses in excess of $3 billion annually in potential worldwide revenues due to piracy."
This assumes that people would pay to view the movies that are illegally copied. I wish people would stop this piracy business, so the MPAA/MPA couldn't blame their revenue "loss" on anything except the fact that what is produced is 99% garbage.