[jlawer]

They use exclusive sections of an existing colo provider facilities, often called data suites or data halls at least in Australia, where the 3 AZs are split between numerous commercial colo facilities.

They get enough control through their contracts to make sure the hosting provider provides exactly what they need to spec.

[kelp]

Yeah, this is correct. You usually buy these in minimum sizes of about 1MW.

[jcims]

Interesting! Thanks for the info!