Click-fraud in online advertising siphons several tens of millions of dollars from the online advertising ecosystem. In this talk, I’ll talk about our in-depth investigations into one of the most common ways of committing online advertising click-fraud. I’ll focus primarily on the techniques and parties involved, their incentives, points of vulnerability, and how these vulnerabilities can be exploited to get them to stop. This talk will not be recorded for reasons that will become apparent during the talk.