The music publishing and licensing industry (vastly different from the actual creators, mind you) isn't as straightforward as people believe it to be. Music licenses are extremely tricky and (often) subject to the whims of the publishing labels.
There is no standard rate for a licensing specific tracks (or set of tracks) and the licenses that are available in the market are either too broad and expensive or too narrow and useless.
The entertainment industry in general is a mess - nobody knows how to handle the internet as a viable platform and nobody is willing to risk their profits to attempt and make mistakes either. They are trying to force an outdated method built for a one-way channel (needle-hour plays) on a platform that primarily believes in two-way interactivity.
In other words, they are trying to license content by syndication in a world where RSS, APIs and interactive conversations are the norm - not only is it a ridiculously laughable concept, but it goes against the very grain of the entire thing.
The whole entertainment publishing and licensing industry is in dire need of an overhaul. Unfortunately, the question everyone is too busy asking, is the question everyone should be trying to answer together: "Who will bell the cat?"