According to a new study from marketing analytics service SumAll, Instagram is the most effective social network for driving engagement and sales figures. SumAll’s work looked at unpaid and organic Instagram traffic over an 11 month period, and concluded that US businesses that used Instagram saw revenue increases between 1.5% and 3.5% – while their UK partners experienced a 3.6% revenue boost. Nonetheless, SumAll also cautioned that businesses saw diminishing returns on platforms that they over-targetted. It’s up to each business to determine its requisite middle ground.