Spotted via twitter, Google are testing out ads on knowledge graph.
The example makes sense to me. You are looking for x car then why not show a local dealer who has the car?
But I am with Barry who finds this a bit of a shock that google are already testing out monetization on this new information content. I'm sure many are going to be unhappy with google sourcing the content from them and displaying a competitors ad next to it.
http://www.seroundtable.com/google-knowledge-graph-ads-17813.html From a twitter source @gfiorelli1 via Barry at seroundtable