In economics, economies of scale are "the cost advantages that enterprises obtain due to their scale of operation" (Wikipedia/User:Loraof).
There is a common type of scaling, mostly in services, where the cost input is negligible, but users are in turn expected to use a small amount of the resource compared to the potential maximum they are provided. Good example includes Internet service providers or cloud storage providers, or banking if we go with traditional services. This allows a service provider to manage a small amount of resources which, if everyone utilized the maximum they could at a given time, would make the service or provider collapse.
What is the term, if it exists, for this type of scaling/economics?