One of the most significant adaptive strengths of passive-engagement communications is that where other forms of communication wither and die when people aren't particularly paying attention, passive-engagement forms actually thrive on such conditions.

This is germane because we live in an age in which there is such an incessant clamor for our attention that it has become, in a sense, our most precious and limited commodity.  The general din and babble has reached such a crescendo that most of the time it is effectively just noise—almost like the impenetrable noise of military radio jamming.

In such a context, passive-engagement communications function very much like the techniques that the Soviet military developed in the latter stages of the Cold War, piercing through the jamming in extremely short, powerful bursts.  Well-chosen, compelling images have the power to enter into our consciousness, then become "true" though repetition.