First, you must rent disk space to store your information. Second, as people around the globe access your information, the computer expends processing power to transmit the pages to the viewer. We create your pages with special category information and then blast announce them to the world. Once the robots know, then everyone with a web browser anywhere in the world can find your information. The cost difference is directly related to the time it takes to spread word about your pages throughout the world.
Nothing is fixed like in traditional advertising.
Web pages are flexible and dynamic. Updated pages are instantly available to the whole world. This is highly unlikely, yet until you grasp why Web advertising works, this will seem a major concern. Understand that with so much information out there, people only seek what they desire. Therefore, if your information is categorized correctly, everyone looking at your pages will at least have some interest in what you have to offer.