subject: Advertising on Radio [print this page] For those that are going big and developing a business model around their broadcasting there is still cost involved to running it before going into profit. To make it a business success it is important to monetize what is being built. Once a large audience of 50 thousands listeners is achieved, companies wanting to connect with a particular group will be open to buying online radio advertising in the form of 30 second radio ads and infomercials or branded shows.