AhHA!, I knew it. Mull is actually jacked in and controling the net. He is an unstopable machine. Those ad's are obviously remnants of his subconcious, surfaceing as advertisments. He must be harnessing all of our computers to instantaneously produce his amazing artwork.
He IS the Lawnmower Man. A Max Headroom with infinit power, A real life Neo. He controls the Matrix, noooooooooooooooooo.