Read the following article and answer the question.

I preordered Warhammer Online at Amazon . On August 27th , I got my codes in my Media Library to join the open beta that starts on September 7th . There is a second code for the head start and the bonus items . I put the code in for the head start and bonus items and it worked .

What may be the reason for them explaining their preorder experience ?
Someone may have asked them .