Blogs sell display ads which are part of the big 41% slice of the pie chart. The smaller ones sell space entirely through AdWords--I think that's in the 41% as well, but I'm not sure.
What I don't know is what constitutes blog spending under the category of social media. Running your own company's blog? Outreach and free stuff aimed at influential bloggers? Astroturfing?
What I don't know is what constitutes blog spending under the category of social media. Running your own company's blog? Outreach and free stuff aimed at influential bloggers? Astroturfing?