Every business - secular or religious based - know the importance of imagery in relation to attracting investors/supporters of said business.
Q: What are the kind of people who are attracted to JW imagery, and why do these particular types fill a niche in the market?
The organisation is able to be studied in this light, as an example as to how long it takes for a small business to gain popularity and how long it takes for the business to grow in the hustle-bustle of the market place and what clientele the organisation is attracting which are otherwise not accounted for in said market place.
The image below, is just one of many which are used to attract a particular type of human being with the expectation of getting them to part with money, and the method used to spread this organisations advertising involves getting the clients themselves to promote the business by freely distributing the propaganda door to door, not even having to pay said clients for the service, as the clients believe they are doing so for the Christian sects claimed leader, "Jehovah", and therefore willingly promote the JW.Org for free, based upon the promise of reward "When Jesus (Jehovah's representative) returns" - or some similar type promise. "Pay in this life - get your reward for service in the next"
With images of what that promised next life will be like.

There are of course many types of imagery used by this organisation, which gives a clear indication of the types of individuals that the business is focused upon attracting, to build the numbers and maintain their piece of the action in the marketplace.
The image above, represents a white middle-class nuclear family walking hand in hand toward an idyllic scene, appropriately costumed in acceptable garb, and no other humans around.
Q: What does this image invoke in the individual who identifies with it?
Q: Who is most likely going to identify with it?
Obviously the JW organisation is reaching out to white middle class family orientated folk as one type of customer in which they feel their message will take hold and earn money from.
I, for one, can bear witness to the fact that white middle class people representing the organization are predominately the ones knocking on my door, trying to get me to buy into the JW.orgs imagery.