Originally Posted by Blizzard Entertainment
In the upcoming content patch 3.2, Call of the Crusade, we are changing the Upper Deck Trading Card Game mounts to be Bind-on-Use instead of Bind-on-Pickup. This will allow players to sell newly redeemed TCG mounts in-game through the trade window, Auction House or via CoD. The primary goal behind this change is to help reduce the number of players who are getting scammed by trading for an invalid mount code. As part of this update, the NPC vendor functionality currently in place for these mounts will be removed, and instead the mount (both epic and non-epic when applicable), will now be immediately placed in your inventory upon the verified redemption of the code. If you have already redeemed one of these codes and have not purchased both the epic and non-epic versions from the vendor window, it's important that you do so before the patch is released.
This update will affect the Spectral Tiger, Swift Spectral Tiger, X-51 Nether-Rocket, X-51 Nether-Rocket X-TREME, Big Battle Bear, and Magic Rooster Egg. Items that were obtained before the patch will not be affected by this change and will continue to be soulbound to the character that purchased them.