One embodiment of a system (3) that provides more than one technique for delivering media and advertisements to consumers (26a) and consumers (26b) over a network (23) and, where a technique permits, measuring the exposure of consumers (26a) and (26b) to the media and advertisements with precision and, where a technique does not permit, using exposure information from other techniques to demonstrate consumer (26a) and (26b) exposure to the media and advertisements. Advantageously, offline consumer (26b) exposure to downloaded media content and advertisements can be demonstrated, which significantly increases the attractiveness of downloaded media content to advertiser (5).