mrstickball on 14 August 2007
The 45m number is XBLA downloads only. I believe that the number is just for downloaded XBLA games - trial or otherwise (I assume).
However, MS did release some XBLA numbers ages ago, stating that the sell-through rate of downloaded games was exceptionally high. I believe they said 30% of all downloaded XBLA arcade games are purchased. That'd put the number at somewhere in the 15 million area for paid-for XBLA titles.
Back from the dead, I'm afraid.
