How do you click on the Radio? Simple. Affiliate marketing has been doing this for years, with tracking built in. The radio announcer mentions a "deal" and to get that deal you must go to the website of the company and click on the "Heard about us on the radio?" link (or some other such link). Then you provide info on the radio personality and you get a deal. See example at: www.proflowers.com (microphone in top right)