The listing, RARE! Thor: The Dark World HD DC+ Digital Copy Code (from Blu Ray, GIN 30000) has ended.
Just saw one of these go for 42000 credits via auction (see the link below). Really is rare. GIN for 30000.
http://www.listia.com/auction/23731184
This auction is for a digital copy of this movie only -- no Disney Movie Rewards. It will redeem through digitalcopyplus.com and should then appear in your Disney Movies Anywhere (DMA) collection, which can be connected to common services such as VUDU, iTunes, and Google Play for playing. No physical media is included. FYI, I will always entertain reasonable offers on auctions with no GIN, but if I have set a GIN already, I will not lower it. Email if you have any questions. Good luck!