On 2 different accounts I was unable to get the daily reward from the store with my main characters. It did not show up at all for them. On one account I switched to an alt, the reward was available, I accepted it and mailed it to my main. On the other account, I switched to an alt, the reward was available but instead of accepting it I switched back to my main to see if it was now there. It was not and now it is not available to any of my characters on that account.