More Than 1 Million Ads Have Been Made With CP+B's Clever 'Commercializer' for Letgo Tool brings big-budget flair to your classified When Crispin Porter + Bogusky Miami first started working with mobile app Letgo—a classifieds app that lets people sell their unwanted disco balls and other treasures—it created a fun digital component called the Commercializer. With the Commercializer, people could