The majority (69%) of media planners and agencies now use online advertising networks as part of their digital ad buys, representing a 24 percent increase in the past 18 months, according to a new study by Adify Media. "Especially in light of the Dynamic Logic study that found that creative quality is 50 to 75 percent responsible for campaign success or failure, agencies must start evaluating the creative capabilities of networks," said Russ Fradin, president of Adify .