Jacob knew how to place his products on the market effectively. He exploited the latest inventions cleverly, by creating large composite woodcut prints for example. He also had an instinct for what different target groups wanted. To the crowds of pilgrims that wondered past his workshop to the Holy City chapel each day, he sold religious prints. Affluent burghers of Amsterdam favoured his paintings of the Virgin Mary and sweet angelic musicians. For his principal patrons, such as Pompeius Occo and Jan Gerritsz van Egmond he made wonderful, costly masterpieces, catering to their every wish.