Cardlytics is a digital advertising platform with a scale roughly 80% as large as that of Google and Facebook in the U.S. when measuring connections to the adult population. The consumers connected to Cardlytics have credit or debit card accounts at financial institutions, which see card-linked offers as rewards programs. Based on their card spending history, cardholders receive targeted offers from advertisers. These initiatives build in-store traffic as well as online sales for restaurants, retailers, subscription services, and other merchants. Since its launch in 2008, Cardlytics has had...