From his webpage:

"PS. I'm giving away FREE Memberships as my way of digging the well we all drink from a little deeper. MinkTrapping.com is for the serious mink trapper and those who are just getting serious! You do have to act fast because this offer's only good for the first 3,000 trappers to sign up. Because we have limited space you have to keep active or you will be dropped as a member."