"Advertising" comprises many things. There are a lot of companies that would "advertise" in the context you describe. Think Coca-Cola or Pepsi. Not stating w

"Advertising" comprises many things. There are a lot of companies that would "advertise" in the context you describe. Think Coca-Cola or Pepsi. Not stating whether or not this is a good idea, but finding advertisers would not be much of a problem with such a system.