I've had the card since I bought a 360 a year or so ago and never did anything with it since I had the disc version. It hasn't been scratched yet but once someone claims it I'll scratch it and send the code via PM. I imagine that anyone that wanted the game has it by now though.
This may already be known, but I just found out last night. I sold my physical copy of Forza 5 to another board member so I could keep everything digital. When I would go to the Store it would only show Uninstall for Forza. I wasn't really looking forward to having to download over 30gb when it was already on the hard drive. Last night I went to get the download started but since the disk was no longer in the system the Store showed $59.99. I clicked Buy and it started downloading. A few seconds later it finished and the game was ready to play.
In short, if you want to go digital but don't have the internet for it, you can get the disk from someone, install the game, then purchase the game in the Store and be digital.
I have the 14 day trial that comes with the One, the 7 day trial from Forza, and another card I found for a month of Gold, Hulu Plus, and Epix but I'm not sure if that has expired or anything like that.
14 day trial - C7Q7H-88XD6-3FMW7-BV4WR-HD4WJ
7 day trial - 8YMXK-HVY77-3KGV4-HQ7X3-D37KG
1 month Gold trial - W7M86-PJMCV-6V63B-XFX4X-4XTK2
1 month Hulu trial - XNYU-JPZ5-DABU
1 month Epix trial - xboxbundle13-g4krd-rjrxr
I haven't tested any of them yet. I'm not even sure my SNES will still work. Most of them are nothing special but there may be interest in a couple.
The 7th Saga
Illusion of Gaia
Mortal Kombat 2
Spider-man X-Men Arcade's Revenge
Super Black Bass
Super Caesars Palace
Super Mario All-Stars and Super Mario World
Super Star Wars