Top row, from left: Chiriboga, Grijalva Garcés, Hermosa, Kalil, Ortiz and Quezada Sierra;Bottom row, from left: Roca Pesantes, Sánchez Paz y Miño, Sierra, Terranova Ponce and Zea. (Adlatina)
WPP Media has issued a report attacking the quality of desktop and mobile inventory sold via Publicis Groupe's Epsilon SSP, a rarity even among industry rivals.