Meta wants to fund this project, but doesn't want the debt on own its books (because it would impact its vanity AA credit rating). Debt investors are happy to finance a special purpose vehicle guaranteed (in a non debt way) by Meta at a credit rating almost as good as Meta's (say, A). No one is confused this is Meta getting financing for their own project; they've just put it in a wrapper for vanity credit score reasons.
Levine wrote about it and his writing is better than ChatGPT, this snarky website, and obviously mine: https://www.bloomberg.com/opinion/newsletters/2025-10-29/put... .