The article claims that Apple is on track to spend around $300 million on GCP storage services this year. With redundancies, server costs, and DC costs, the upfront price could easily touch 3 to 6 billion, or 10 to 20 years of GCP storage costs.
Surely it didn't cost GOOG $6B upfront worth of infrastructure to get $300M of annual revenue from Apple. Yes, there's economies of scale, but I think you overstate the case.