Shame my backside! That's precisely what it was, nothing but a business decision. But guess what? Some of us are fed up to here with those who treat comics as nothing but a business. If you're going to play the crack and resubmit game, you better be prepared to lose some of the time. And don't you come crying to this board to get sympathy. Most of us will just snicker.
Admittedly, CGC got it very wrong somewhere this time. Well guess what? You're paying for their subjective opinion. It's going to be wrong, very wrong, a lot of the time. Them's the breaks. The submitter paid for their subjective opinion. He got it, and that's that. CGC makes no warranties other than that they make an unbiased best call. CGC owes the thread starter nothing.
The lesson to the rest of us though is to be very careful about overpaying for a slabbed comic because of the number on the label. That number doesn't come down from God. There's a large random element in its assignment, and it's subject to change.