DO YOURSELF A FAVOR and read the reviews of interviews here before spending even a minute of your time on Quantcast. If you are reached out by their recruiter, run. The common theme is they string you along until the last stages, having wasted your time with presentations and homework, and only positive feedback. But for whatever reason, the role is no longer available for you but you were SO CLOSE. They actively try to recruit from competitors and then likely use the intel from the interviews for their own benefit, very sketchy. If you are in sales, do not interview here and if you do, be forewarned that you will be wasting your time and likely sharing your current company's intel in the guise of an open role. You are not missing out if you decline their attempts at recruiting you, trust me.