Borderlands: The Pre-Sequel SHiFT Codes

I can't even use them for a week.

What even are these?

"act fast"
As if Randy Pitchford isn't going to spam these on his twitter account every week

Do they only work for Pre-Sequel or they work for BL2 too?

Will they be available until the game's 75% off?

Just like for Borderlands 2 there is a ORCZ.com page

http://orcz.com/Borderlands_Presequel:_Shift_Codes

For those that don't know, this page will keep track of all shift codes for the game. Some codes I'm sure will last a while cause there are some for Borderlands 2 from near when it was released. But some codes might only be active for a few hours (once the game is unlocked)