Free: Contests & Raffles.
Interesting read:http://www.gameandfishmag.com/2010/09/29/hunting_mule-deer-blacktail-deer-hunting_wo_aa075504a/
Its simply to create more "Mature" type bucks, (2.5years old or older) and create a higher buck:doe ratio. It does this by allowing the 1.5year olds to grow up a bit and get a little bit smarter and creates escapement because you can't just go "I see antlers BOOM" you have to take time to look at the rack. I think that APR's and QDM is successfull at its two main goals.