[ciaranm]

But ensuring 5 years of guaranteed service at a fixed price is reducing their risk. It prevents Google from pulling the rug out from under them, or from the price going up and they have no option but to accept it.

I imagine part of their plans are to move away from the dependency, but while it exists - this is exactly how you reduce your exposure to that risk.

[runeks]

All in all, I would say that if needing a new cloud provider in case Google defaults is a big risk factor for your company, your company is in pretty good shape.