I'm glad this promo is still active, as the 50GB from my ATT SGS3 "hack", was due to expire in the summer of 2014, but this'll extend it to the end of 2015, by which time 50GB should be the new minimum free amount of cloud storage anyway.
edit: fwiw, I also used the "virtual machine MAC address hack" (google it) to get another 20GB free, so I've got a total of 70GB for free (which is the max you can get afaik).
phone #1: Note3 (SM-N900T); ROM: TouchWhiz (JB 4.3); Rooted; Xposed; kernel: Stock @ 2.3GHz; misc: Incipio DualPro; 64GB class10 microSDXC
phone #2: SGS3 (SGH-i747); ROM: CM10.2 Nightly (JB 4.3); kernel: Stock @ 1.5GHz; misc: Incipio DualPro case
phone #3: SGS1 (SGH-i897); ROM: CM10.X Stable (JB 4.X); kernel: Stock @ 1.0GHz