Look at the simple page of Daisy News that has been mocked up below. Any relevance to any real people or companies is totally an accident!
In this example, there is only one page, but it would be very easy to have say several pages, with perhaps one for news, one for sport and one for business.
Each would be given say twenty seconds and everything would be controlled by a script file. Note the blue control panel in the bottom left. In a real application, this could be set to a colour that hid it completely.
Why shouldn't the web pages be interspersed with advertising?
All it would need would be to mix the pages with an appropriate call to a server that would display an advert and create a charge for the client.
Imagine a system such as this in your local coffee shop!