NoFound (secret)

The baby of a nonprofit curatorial art project focused on contemporary photography, sign up for NFS's emails and you'll get nude photographs either taken or "discovered" by one of their artists, delivered on a random schedule that could be "twice a week or possibly even once every six months". All you've gotta do is reply to a confirmation email to prove "you are not a robot", since once the terminators take over our underground erotic art, the resistance is surely dead.