I know that this has already been covered in a News Article on the webpage, but I also know that some people are pressed for time and cannot watch the video, so I have decided to sum up the BO3 Loyalty program for the sake of efficiency.
The Program gives multiplayer rewards based on the rank you achieved in one of the last three CoD titles - BO2, Ghosts, AW.
Level 10+ Calling Card
Level 31+ Reticles
The system works by way of a Call of Duty Account and will transfer between consoles (e.g. played AW on X360, bought BO3 on PC, will recieve rewards on PC).
In order to secure your Loyalty Program Items, your game accounts (XLIVE, PSN, Steam) must be connected to the Call of Duty Account by November 5, 2015 at 9:00 PM EST.
Items can be gained by old-gen games (e.g. AW X360) but only come to BO3 New Gen/PC