This article by MediaPost covers Sovrn’s announcement of its Sovrn Viewability Assurance program. Through Sovrn’s program, an advertisers can define its own standard for a viewable impression, select its own measurement vendor, and then only purchase impressions from Sovrn that meet those standards.
Sovrn Tells Buyers To Bring Their Own Viewability Standards to its New Program
sovrnmarketing // September 21, 2015