'Borderlands 2's' SHiFT Codes can do more than give out Golden Keys
Stick Skills: "Speaking on Twitter, Randy Pitchford, President of Gearbox has confirmed that SHiFT is capable of more."
(Borderlands 2, PC, PS3, Xbox 360)
I bet they could be used to give out certain pieces of gear instead of the random stuff from the Golden Chest. Or possibly even more bank or inventory slots although someone asked about that on Twitter and Randy said it wasn't as simple as it sounds to just add more. Which would probably explain the lack of more new slots in the Captain Scarlett DLC.
This seems pretty obvious considering Randy has said many times that these shift code drops are "tests" or that they're "testing and fine tuning the shift system". Generally speaking, when you test a content delivery system it's usually done to ready it for something else. What that something will be remains to be seen.
Shift is supposed to be in lots of Gearbox games like the upcoming Aliens: Colonial Marines and probably their 4 person coop game that used to be a Brothers in Arms title. That's probably the "more than golden keys".
Pitchford: "Yes."
Sums up the entire article.