Study says searching for screensavers frequently leads to danger

I remember in the article, "Interview with an Adware Author" >> http://philosecurity.org/2009/01/12/interview-with-an-adware-author , that one of their company's business model was "that they would buy a screensaver from somebody, or develop it themselves.
So the screensavers, they developed mostly have adwares at the least.

But the article "Study says searching for screensavers frequently leads to danger" , the search frequently leads you to malicious sites, which will give you malwares by drive-by downloads via some web browser vulnerablilites probably from CSS exploits or some browser exploits making use of javascript or some plug-ins' vulnerabilites or something like a cross-browser vulnerabilities like clickjacking via iframe etc...