Well obviously it benefits you because you get to drink great beer beer, but The Wild West Brewfest is a fundraiser for a great cauase:
Youth activity scholarships through the Pendleton Parka and Recreation District
When children from low income families cannot afford participation fees, they can request assistance. In most cases this allows the child to participate at half price. The difference between the cost of the program, and the amount the family can pay, is subsidized by fundraisers such as this.