That's (almost) all in the Source Hunter DLC, which is likely what the person who copied the D:OS Kickstarter description was intending to get, and accidental included the collector's edition mention. There is no Kickstarter potion. There was a problem getting it to trigger one of the desired effects (message on the main menu), so that was added to the Kickstarter code (entered when creating a profile, to enable any personalized content from the Kickstarter rewards).
