You can see this play out in the history of OpenAI. NVIDIA supported them from an early stage and in exchange received OpenAI equity to offset the risk. Now from a position of relative strength, OpenAI has become concerned about vendor lock-in and so is rationally exploring AMD. Yet, because any such deal will materially impact AMD’s stock price and there is risk both of losing time trying to train with new chips as well as of benefiting competitors if they work with AMD to improve their hardware offerings/APIs, it is reasonable to ask for equity upside. So, for the same reasons (increase in stock price and enterprise client who will help improve their product offering) only without risk, is it understandable why AMD would want to offer equity on such favorable terms.
TLDR; My sense is that the sudden skepticism towards this relatively common enterprise deal structure seems to derive from the understandable interest in identifying signs of an AI bubble. Such a bubble may (and indeed almost certainly does) exist, but I don’t think this is evidence thereof.
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EDIT: I'm just clarifying something I saw in a lot of responses. My only point is that it is important to try and empirically tease out what represents: (1) a circular deal in which vendors facing the limits of growth are subsidizing vulnerable clients; versus (2) a risk-hedging deal in which a non-market leading vendor offers upside to a market leading client.
I believe the recent Oracle and NVIDIA deals are cases of (1) that provide evidence of an AI bubble, but that this AMD deal is most likely a case of (2) that provides no further evidence.