Breeder's Sweepstakes Nominated - If you show your mare in class that is sweepstakes nominated and win there is a payout that goes back to the owner of the breeder, up to 10%.
The Breeder's Cup is basically the same for nominated races.
It's sort of hard for me to explain, but here's a link to help you out. :)
Arabian Horses.org - Breeders Sweepstakes