Read an interview between Shailin Dhar and Danielle Gibson of The Drum. In this interview, Shailin describes how current industry practices allow ad fraud to continue.
In addition, Shailin details MMI's "exoneration method", which starts with the assumption that traffic is invalid and seeks to validate, using a "guilty until proven innocent" approach to detection. In addition, MMI's traffic quality metrics are determined by measuring 100% of impression events as opposed to sampling only a fraction of a whole data set.
For more, read the full interview.