Using Druid to Track and Analyze Ad Clicks

Every time you visit a web page there's ads that show up on this web page. A whole bunch of different systems are trying to programmatically outbid each other in order to display you an ad. And all this information is in the it generates events. So an event might be like person X with a certain set of demographics has viewed an ad. Later on another event might occur which is person X has now clicked on this ad. Then is it if I see the direction you're going you'd want to find some kind of aggregation say people like the guy who's about to see an ad are more likely to open the ad if it matches up on dimensions A, B and C.