Pros
Some of the smartest people around work at Quantcast. Their engineering and data science teams are truly top notch and solving some really interesting challenges. The landscape of ad tech will continue to evolve and there is about to be a blood bath as the Lumascape quickly narrows as most of their competitors run out of cash and close their doors or end up as acquisition targets.
Cons
Ego....everyone else doesn't have to be doing it wrong. Believe it or not, there are other approaches that make sense and what they are really doing is avoiding uncomfortable topics such as pricing, margin, mix of tactics etc. They are playing the game just like almost every adtech company to game the attribution model only they are going to point the finger at the same time while retargeting the crap out of the so called "prospecting campaigns".