Because for everyone except techies, the domain that the content is actually served from is pretty irrelevant.
What's the benefit of this (except caching = faster page loads and navigation) for Google? To my knowledge, the ad revenue goes to the publisher, and any other company that wanted to serve the content under their domain could do so.
What's the benefit of this (except caching = faster page loads and navigation) for Google? To my knowledge, the ad revenue goes to the publisher, and any other company that wanted to serve the content under their domain could do so.