Have you ever noticed how bad Google ads are? I get about 8,000 visits or more per day from a hard-to-reach audience of highly intelligent and influential readers, but the ads Google chooses to place in my right hand column are hilariously inapt. If I write about the scandal of lawyers who commit asylum fraud, I get ads from Google for lawyers offering to help you commit asylum fraud. If I write about Bill James's suggestion for prison reform, I get ads for "Save $ on prison calls." If I write about Racehorse Haynes's legal tactics, I get ads for bailbondsmen.
After all these years, Google hasn't bothered to learn one thing about what sells and what doesn't sell on my website. Everything is still triggered solely by keywords, not by a long demonstrated patterns.