Apparently Ubisoft have included the pirated version of the ACB OST in the pre-order version.

The proof comes from the internet’s infinite source of information, Reddit. It seems the mp3s that come with a Brotherhood pre-order were originally encoded as FLAC files by one arsa13. If the Reddit user is right, Ubisoft then apparently converted them to mp3 and stuck them on the game.
After their DRM fail and patching Rainbow Six vegas with a pirate No-CD crack how could they do this again.

Source