the ad services (Google, etc.) doesn't care about your phone's battery life as long as they can serve their ads. They don't get anything in return if they spend time and resources making their ads "more efficient". These companies don't care about the user experience or providing a better product. They're in the ads business not in the making-a-better-phone business.
as far as they're concerned your phone's battery life is a hardware/OS issue.
sad but true.