I think it’s a heck of a lot more than that. 30 million seems puny compared to the revenue their services businesses generates. Though to be fair much of it probably doesn’t run on public clouds.
From what I understood is that everything runs on public clouds. They tried Microsoft, Google, and Amazon. Sooo they should have enough experience by now.
Sourcing here is 2019 article about just one AWS contract. Apple also uses Google Cloud and Azure extensively, not just tryouts, they were one of Google Cloud's biggest customers. They are also building their own data centers. (TL;DR it's much more complicated than these comments would indicate at their face)
