Activision has reported a significant increase in digital revenues for the 12 months ended June 2012, driven in part by the increasingly popular Call Of Duty franchise. Speaking during a conference call with analysts today, which was listened in on by Gamasutra, Activision Publishing CEO Eric Hirschberg said the firm’s online revenues reached $1.7 billion during the period. The figure represents a 22 per cent year-over-year increase from $1.4 billion, and a 41 per cent rise from the $1.2 billion generated during the year ended June 2009. Hirschberg said the publisher has sold 18 million $15 Black Ops map packs to a still growing base of 23 million Black Ops owners. In comparison, Activision shifted 11 million $15 map packs to Modern Warfare 2’s 19 million owners, and nine million $10 map packs to World at War’s nine million