As with all trade shows, while sales are the primary reason for exhibiting, there are many secondary reasons like networking and exposure and seminars that also come into play. (selfpublishing411.com)
(I will discuss secondary reasons in the future.) (david-swensen.com)
Nor should we care for them because Christ tells us to, or because justice demands it, or for any other secondary reason which makes the afflicted mere instruments in service of a greater good, or mere opportunities for our moral behavior. (religion-online.org)