A DigitalPoint Forum thread named Google Offers My Client Center For Adsense shows a screen capture of a "Client Center" for AdSense. We all know Google AdWords offers a client center but AdSense? I guess it is possible that publishers can begin hiring professional AdSense gurus to manage the ads on their properties. Hence the need for a client center.
What is weird, is that the URL in the screen capture of this page is to https://www.google.com/adsense/mom-online-report. For me, that page returns at 404 not found error. Anyway, below is a screen capture, and click on it for the original large version.
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Forum discussion at DigitalPoint Forums.