Digital Music News points to a recent and confusing trend in concert attendance. Despite the recent boom of digital concert notification services like Songkick and Oh My Rockness, concert attendance has dropped by 10.4% in the last four years. Is the proliferation of concert notification services to blame for this downward trend, or is this correlation coincidental, and another explanation to blame? Is it possible that increased concert awareness has driven attendees to become more selective? Somebody had better run a study on this ASAP. Let us know what you think in the comments.