effectiveness. Engage has generated most of its revenue to date through sales of its advertising management software and outsourced services, as well as its services for measuring and analyzing Web site traffic. Engage is currently testing its Engage Knowledge data service with customers, and plans to

implement this service on a commercial basis in July 1999. Engage Knowledge will provide real-time access to Engage's database of more than 30 million anonymous profiles of Web users for more effective targeting of online advertising, promotions and content. Engage expects that a significant portion of its future growth will be attributable to sales of subscriptions to the Engage Knowledge data service and other products and services that will be based upon Engage's profiling technology.