1. A system, comprising: at least one computing device; and a service client executable in the at least one computing device, wherein when executed the service client causes the at least one computing device to at least: receive a set of data items from a service provider via a data transfer interface; determine which of the set of data items are used by the service client; generate usage metrics indicating that a proper subset of the set of data items are used by the service client; and report the usage metrics to the service provider.