Oh snap. I just found his loophole:
If you look in his wall of text, in small print about halfway down, he has this information hidden:
Although the interior artwork was by Ditko alone, Lee rejected Ditko's cover art and commissioned Kirby to pencil a cover that Ditko inked.[11]This auction is for a Amazing Fantasy #15 reprint only, this is not the original comic. Pictures that are shown in the picture gallery above do not represent the reprint comic being sold nor do they represent the comic in anyway. Bidder/Buyer accepts that he/she as read the full description/details of this auction listing. Good luck to all bidders! As Lee explained in 2010, "I think I had Jack sketch out a cover for it because I always had a lot of confidence in Jack's covers."[12]
Its in small print. What a person_who_is_obnoxiously_self-impressed.