 Often known by its initials NTFU, it had an initial focus on user-contributed amateur pornography until it adopted a novel business model whereby U.S. military personnel, unable to use their credit cards due to the point-of-sale being located in high-risk regions and wary of repercussions from their superiors, could gain access to the site's content in exchange for proof of military employment for free memberships.The first pictures submitted were soldiers posing with tanks and other harmless situations.As word spread of the free admittance, so-called trophy photos, or graphic depictions of corpses and other disturbing imagery direct from the kill zones in Iraq and Afghanistan began to be submitted.