Improved techniques to restrict sharing of media assets over a network are disclosed. A server computer having media assets can permit one or more clients to receive access to such media assets over a computer network. However, the access to such media assets can be restricted based on numerical limits as well as temporal limits. The media assets are digital media assets, such as audio items (e.g., audio files, including music or songs), videos (e.g., movies) or images (e.g., photos).