You don’t know this with certainty, do you?
Companies (CRWV, etc) are borrowing at 10%+ interest rates to buy NVidia GPUs that NVidia makes 75% gross margin on. I repeat, companies are selling junk bonds to buy GPUs at a 300% markup. Cocaine dealers probably don’t even make 75% gross margins.
Other companies (OpenAI, etc) are also borrowing at 10%+ interest to rent the GPUs to train LLMs.
All of these GPUs need a ton of RAM. There is a fixed supply of RAM. There is insane demand for RAM.
Besides, when demand outstrips supply you don't have to fix prices. Why would you? They cannot deliver all of the RAM people want. Think about it for a minute: how would price fixing even work?
(and don't get me started on the ridiculous "they're switching from DDR3 to HBM" part of that wikipedia article...)