It's not. This article is weirdly light on details. The original source article from The Information apparently mentions that companies like OpenAI are buying them up to run RL. So it's yet another case of AI companies buying all the compute.

* I say apparently because The Information wants you to sign up for access to the article, but I found this mentioned in multiple summaries of the article like this one [1].

[1]: https://tech-insider.org/openai-mac-buying-apple-supply-shor...