The Real Cost of The Used Market - PlayStation 3 News at IGN
Speaking to GamesIndustry.biz (via Eurogamer), Guillaume de Fondaumiere co-founder of Quantic Dream said, "We basically sold to date approximately two million units. We know from the Trophy system that probably more than three million people bought this game and played it.

"On my small level it's a million people playing my game without giving me one cent. And my calculation is, as Quantic Dream, I lost between €5 and €10 million worth of royalties because of second-hand gaming."