You'll get to sponsor the all for an entire year. A description of your blog, a photo/graphic element of your choice, for an entire year at the end of all the nine posts.
Considering that Google AdWords cost between $1 and $2 per click, you can expect to pay a lot less per click if you do this. Considerably less.
Thousand of people are going to click on those links and visit your blog. It's your best chance at reaching thousands of potential readers for a lot less than traditional advertising.