abstract:The attach rate of a product represents how many complementary goods are sold for each primary product. For example, the average number of DVD-Video discs (complementary product) purchased for each DVD player (primary product) sold, or the number of console-specific video games purchased for each console sold.
Borderlands 2, the irreverent RPG-Shooter is approaching six million copies shipped, as well as a very strong attachrate for its exemplary series of DLC.