Not to beat a dead horse, but the algorithms are anything but random. The "Date Wealthy Men" ad is here because countless thousands of trials of where ads like that appear, and their resulting click-thru rates, predicted that RJ is the most likely place they will be clicked on (based on the entirety of RJ content, prior click-thru history, and visitor demographics).
Google makes billions and billions of dollars because their algorithms are better at ad placement than anyone else by a significant margin. Google spends hundreds of millions of dollars on PhD-level research and development to get it as good as it possibly can be.
It's almost always surprising to site visitors and even founders, just which ads will work and what ads won't. In the old world of human-controlled advertising, ad placement struggled to achieve results better than random, but these days, it's 80% probable the ad is in exactly the right place because the evidence from millions of data points support that placement.
The same discussion comes up here many times regarding political ads (specifically Republican ads) -- but it's the same thing. Republican ads are here because they are more likely to get clicked on; as surprising as that may "seem", it's an objective fact.
It's quite fascinating, really -- as evidenced by my continued geekage on this thread