Microsoft adCenter was all about greater relevancy, more traffic. Based on their April 29th notice, the world waited in anticipation. With their upgraded version the truth seems otherwise. As we reported earlier, we all know how the results affected users.
Of late Many adCenter users are switching allegiance to other providers. However, there are a few members at Search Engine Watch Forums who would like to stick it out as long as they achieve a decent amount of ROI. Microsoft had carved out a niche for itself, thanks to the high conversion rates minus the high traffic of Google. They should fix the loop holes and bounce back soon as competition is good for everyone.