Commodity Marketers are a critical component to much of the world’s economy. The model is used to trade a wide range of assets – from a barrel of oil and a pound of coffee, to the value of an Apple stock and even future weather patterns. In this piece by Mariano Saenz, CEO and co-founder, Winclap, Saenz discusses what he believes is a key issue faced by mobile app developers: throwing a lot of money at user-acquisition campaigns, paying higher and higher CPIs, with not enough ROI to show for their expenses.