If they can't find it - hard luck. Then you have Prize Money. Some years ago it was thought that increasing Prize Money would attract more exhibitors. The bulk was directed at Best in Show, etc. It would be far better if the money was spread out with the scale being balanced in favour of Juniors and Beginners and Novice exhibitors.
Champions reap the benefit of their wins through sales.
Of course, when you refer to prizes you have to remember the C.C's. These are eagerly sought after by exhibitors but unfortunately, not for all the same reasons. Those in the lower classes treasure them because they feel they have achieved something. Well, unless I am mistaken they are of great help when selling surplus. A C.C. is a C.C. immaterial whether it has been won in a strong class of Greens or Grey Greens or just in sparsely contested Rares.