Todd is one of the founders and owners of hunting.net. I presume this is an offer extended to the members of the hunting.net message boards in appreciation of our memberships here. If you aren't interested in the course, so be it. It was more of a special offer for members here, not just a normal spam. Hiding your e-mail on the message boards keeps other members from being able to see it and send you mail. You are required to give an e-mail addy when you register, so that is probably where it was obtained.
I doubt you'll get an appology e-mail from Todd on the "spam" Does your delete button work?