The problem is that demand for Redbox’s rental volume is falling off. The service’s usage peaked at 772.9 million in 2013 and fell to 717.1 million in 2014 and 587.6 million in 2015, Variety reported. This affected Outerwall’s revenue, which fell from $2.292 billion in December 2014 to $2.193 billion in December 2015.