Dance music releases usually only have a shelf life of around 8 weeks. There are obvious exceptions to this rule but 95% of releases are played in clubs and sell for this length of time and that’s it. File sharing screwed this up by both the sales and also the structure of the chosen few influencing bigger DJ’s not having something they can fully get behind during the promotional stage of a release. Therefore less people got to hear it, less are influenced and less potentially buy it. The industry has never really recovered from file sharing but more recently the sale of mp3′s and specifically dance music mp3′s has boomed and this has helped to a certain extent slow the decline and with time the scene could once again flourish.