A lot of people are asking that question today after the company behind the DVD rental kiosks reported disappointing results for Q2. Shares of Outerwall (formerly Coinstar) closed down 13.2% after it said that Redbox revenues increased just 4% compared with the same period last year — even though the total number of kiosks was up 13%. Redbox came up short as bargain-hunters took advantage of promotions and only kept discs out for one night, resulting in a 9.9% decline in average revenue per kiosk. (DVDs go for $1.20 a night with Blu-ray discs $1.50.) The company also cut its forecast for the number of kiosks it will add this year while the experiment to sell sports and entertainment tickets at the kiosks “did not meet expectations”, CEO J. Scott Di Valerio told analysts. These developments will “accentuate concerns that the DVD rental market is quickly approaching saturation, and we believe that this is probably true”, says Wedbush Securities’ Michael Pachter.