Quad/Graphics, Inc. announced that it made a strategic investment and entered into a long-term partnership with the dtx company, a leader in the direct-to-consumer economy.    dtx is announcing a new direct-to-consumer ecosystem, UNBOX, which helps consumers directly discover and access brands, and helps brands get direct control over their customer relationships, customer acquisition costs, and customer data. Through this partnership, Quad will support its multichannel ecosystem through dat...