I went through and bought the expansions as a gift for a friend the other day and sent them the keys and instructions on redeeming them.
For the Shadowfell Conspiracy there were not any issues. However, when attempting to redeem the MotU key we ran into problems. Trying the key through the DDO store code redemption did not work. And the instructions for MotU(And only that expansion) mention going to myaccount.turbine.com and signing in there, then redeeming the product key that way. However, upon signing in there, there is no field at all for putting in a product key for DDO.
Has anyone else had this issue, and figured out a way to redeem the expansion?