Few people can get inside your head—or at least the part of your brain that makes spending decisions—quite like Scott Grimes and Lynne Laube. The co-founders of Cardlytics Inc. deal in some of the most valuable and revealing personal data on the planet: how people use their debit and credit cards. They’re quietly helping some of the largest banks in the U.S. to mine what’s known in the trade as purchase data and use it to encourage customers to buy more things with their plastic. Conventional banks are trying to raise their data game to fend off fast-growing financial technology startups and hold on to customers. ... (full story)