iHeart streams nationally (from an HD2 in Dayton, OH) a station that repeats 24/7 Casey Kasem AT40 shows from the 70s and 80s. Their stream appears to not have any commercials except promoting other iHeart streams and podcasts. How does iHeart make any money from this stream if there are no commercials, especially since I am assuming they have to pay some royalties to songwriters for music played.