They won't. Also they won't show the back covers. Much more, they won't update their website. They are simply stubborn.
I wonder how much of the scans shown is dependent on what the seller gives them to use?
In the case of the book I bought, it had huge front and back cover scans, and a nice pre cgc scan of the interior pages before grading.
But I agree about updating their website, that will never happen.
. . . nor will book sales ever appear on GPA
I talked the reps from GPA once. Clink is not partnered with GPA.