The Homeworld ad came again so I opened firebug to try to inspect the element and figure out wtf kind of ad that thing is. Didn't recognize anything. Here is the copy of the "Outer HTML", whatever that is. I thought iframe stuff was bad and insecure, so I was surprised to see that it is using iframe.
<iframe src="javascript:'%3C!doctype%20html%3E%3Chtml%3E%3Chead%3E%3Cscript%3Ewindow.addEventListener(%22message%22,function(e)%7Be.source.parent.postMessage(e.data,%22http://googleads.g.doubleclick.net%22);%7D,false);%3C/script%3E%3C/head%3E%3Cbody%3E%3C/body%3E%3C/html%3E'" srcdoc="<!doctype html><html><head><script>window.addEventListener("message",function(e){e.source.parent.postMessage(e.data,"http://googleads.g.doubleclick.net");},false);</script></head><body></body></html>" style="display: none;"></iframe>