Looks like you might be able to get 10 keys again this weekend.
Nice I need to replenish my stash. I burned through 6 of my 10 I had. Used 2 when I hit 50 with my Siren just for shits.
Since my Axton and Salvador were power leveled to where I could get the achievements, they had those default start weapons. Used 2 on each of them to try and get some decent guns.