Share 'Why are PDGA tournaments run by volunteers and clubs?'

Is disc golf really a sport, or is it just a novel recreation at schools and public parks? Disc golf is the only “Sport” I know of where the amateurs and club volunteers donate to clubs to run PDGA Sanctioned Professional Disc Golf Tournaments. All other sports that I know of have Vendors as the primary sponsor, and they PAY the people that help to run the tournament.