An anonymous reader writes with this quote from 1Up:
"Trouble is brewing in Rapture. The recently released Sinclair Solutions multiplayer pack for BioShock 2 is facing upset players over the revelation that the content is already on the disc, and the $5 premium is an unlock code. It started when users on the 2K Forums noticed that the content is incredibly small: 24KB on the PC, 103KB on the PlayStation 3, and 108KB on the Xbox 360. 2K Games responded with a post explaining that the decision was made in order to keep the player base intact, without splitting it between the haves and have-nots."