I actually jusy found this article.... it's an excellent read and it answered your question better than I was able to. The Fur Trade: The Journey from Trap to Market | Outdoor Life Sent from my SM-G900V using Tapatalk
Interesting that this is heavily promoted in the States. The vast majority of paper's expressing academic vigor which I examined during post-secondary expressed issues with predator management in relation to conflict reduction. I'm not completely against it all, just expressing healthy skepticism. If it is legal and you believe in it just please respect the animals like you would a deer- and yes I do know that it is legal!