Jul 24, 2014 - Clickky brings performance marketing into the mobile ad space, with its brand new CPE campaigns. CPE or cost-per-engagement model means that advertisers define metrics to differentiate the engaged users. It could be anything from completing an in-game tutorial to sending an email. The campaign cost is determined based on the quantity of engaged users rather than clicks or installs. This model helps advertisers acquire new active users rather than increase app install base.