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" The industry has tried its best to defend its intellectual property and make it less appealing to download , but it 's not clear it 's changed everyone 's attitudes , " Card said . " We've set up the system so it has to be user-driven , " said Digg Founder and Chief Architect Kevin Rose . Yet such heavy surveillance did not prevent the 7/7 bombings and the deaths of over 50 people . " Most people have found by now that trying to make money off of digital music without an ancillary revenue stream is not easy . " " We've set up the system so it has to be user-driven , " he said . The purpose of the investigation was simple : we had to be certain that the tires on our vehicles were as safe as possible for our customers .