Brand necromancy had to be performed several times before it saw the success of the current incarnation, such as it is. (I don't know how successful it is.) At this point its only connection to the original Napster that established the name is the name. My point? How you account any current success that the name may be experiencing is a very debatable point, depending largely on which of several valid definitions of the relevant terms you choose.
It got bought by best buy for over 100 million dollars. It is a great service, I'm listening to the new wilco album on it right now.