The value of each performance is determined by several factors, among them the amount of license fees collected in a medium (television, cable, radio, etc.), the type of performance (visual vocal, background music, theme song, jingle, etc.) and the economic significance of the licensee (how much a station pays us).
ASCAP also has this to say about it's licenses:
General Licensing administrates license agreements for more than 300,000 businesses and organizations. Because businesses use music in different ways from bars and restaurants to telephone music on hold there is no single license structure that covers every application.In General Licensing we have worked with various types of businesses and organizations to develop over 170 different licenses to cover your specific musical uses. We are unable to post licenses on our website but a list of available licenses can be seen here: List of Licenses.
It's a complicated business, and nowhere near as simple as we who aren't in the business realize.
If enough artists prevent AI from using their songs, maybe we will see the demise of AI sooner than we thought.
BTW, thank you for the great information. :)