The Google engineers are also trying to release their methods. This is not detecting 'fraudulent' activity, but rather trying to classify adversarial advertisem

The Google engineers are also trying to release their methods. This is not detecting 'fraudulent' activity, but rather trying to classify adversarial advertisements: http://research.google.com/pubs/pub37195.html http://research.google.com/pubs/pub37195.html (pdf is linked there). You can assume that they are doing the same types of thing to classify fraud.