You get one for becoming a Gearbox Shift member, and more for using codes released via twitter. --- The SAFE was slain in battle. A great flaming nautical pyre carries it off to VAULTHALLA. www.youtube.com/user/Terrafuror - Gimme a view, sweet cheeks ;)
clap your hands together as hard as you can, then proceed to rub them together as fast as you can for 1 minute. Finally put your palms on your eyeballs, take three deep breaths, and presto. key for chest :)
You need to buy Wonka Bars, and when you find a magical golden ticket it'll have a code for a key.... You use that code and get a key, what you'll find inside is anyone's guess, nobody has been inside that Golden chest for years..