Posted By:
HankronMy answer is that just as it is wrong to assume that every blank backed & handcut card is a proof, it is wrong to assume that everyone was cut from an advertisment.
I would want to talk to the relevant person(s) at GAI and see why the labelled it as a proof. He may have worthwhile reasons and keen understanding that convince me. As no one from any grader has ever attempted to contact me (Except for Roy Huff who inquired about the quality of the pictures in a Babe Ruth book I had for sale), such commuication is unlikely.