There might not have been anything worth playing because Jeff Bezos might not have been a music person. According to "The Everything Store" by Brad Stone:

There might not have been anything worth playing because Jeff Bezos might not have been a music person. According to "The Everything Store" by Brad Stone: Bezos's colleagues and friends often attribute Amazon's tardiness in digital music to Bezos's lack of interest in music of any kind [...] Colleagues remember that on the solemn road trip from Target's offices in Minneapolis after 9/11, Bezos indiscriminately grabbed stacks of CDs from the bargain rack of a convenience store, as if they were all interchangeable.