CheckiO and Treehouse

So, I read the post here, and also posted a question, but I've been doing a little more research and figured it'd be more appropriate to make a forum post.

http://www.checkio.org/blog/checkio-and-treehouse/

This post mentions a free month of Treehouse and a "special partner discount", but when you follow the link, the Treehouse end of it does not reflect a free month or any sort of discount. So what are the details of this? Is the discount something consistent, or is it just a discount on the first month! Sorry if it's a bother! Thanks!