Completely agreed. I note in a comment below that my only aim is to distinguish between deals that provide new evidence of a bubble and those that do not provide any further evidence towards that conclusion. I think the Oracle and especially the recent NVIDIA deals provide such evidence, while this AMD deal does not.
As @stingraycharles notes above, the AMD stock went up a lot already and this "may finally enable AMD to get a foot in the door in the whole large scale AI market."
I think the skepticism comes from the recent OpenAI/Oracle deal which seemed kind of circular due to paying with equity whose value was being inflated by the deal itself (if I understand it correctly). This deal seems more like an outright gift of equity if OpenAI goes through with the deal - so it could be thought of as almost a rebate or net discount on the cost of the GPUs.