A system includes a network interface and one or more processors. The processors are configured to track a first pattern with which a user terminal consumes one or more data services while served by a home network specified for the user terminal, to track a second pattern with which the user terminal consumes the one or more data services while served by one or more networks other than the home network, to estimate a reduction in usage of the one or more data services between the first and second patterns, and to selectively enable at least one data service to the user terminal by the networks other than the home network, based on the estimated reduction in usage.