New update:
Let me clarify,
My changing from a PSA 9 to a PSA 10 was a unique situation trigged by someone in PSA who saw my original post displaying all of the 9s. It was obvious that the grades originally given were not fair, and so the entire sub was re-graded.
This was done without my knowledge, and PSA did not know I had already accepted buy back offers. I know this raises other concerns but no fraud or malicious activity was taking place here
tl;dr His post on Twitter caught the attention of an employee, who had his submission re-graded after grading was completed (and after he had already accepted offers on cards), and some of those cards turned from a PSA 9 to a PSA 10.
Original post:
This guy on Twitter submitted a large quantity of Pikachu Zekrom GX cards to PSA. All of them graded a 9 or lower. Made a huge video about the issue, dissatisfied about the situation. He accepted offers on most of his submitted cards.
Then today, he posted a new update (which can be found here: https://x.com/PZPTCG/status/1996701380820516911?s=20) - many of the cards which showed a PSA 9 grade, and had an offer using the PSA 9 value of the card, now showed an updated PSA 10 grade instead.
Can be seen below on some of his cards (same cert, grade changed after offer accepted):
