EDIT: It seems the parent deleted its post ... maybe because it had the facts wrong.
And what is that "CNN article" based on? Random bloggers of course! Read its second sentence:
"Bloggers and online media have suggested that the Redmond, Washington-based company yanked the Seinfeld ads after they were poorly received"
Also, where in that article did "Microsoft admit the ads were a dud"?
"The notion that we're doing some quick thing to cancel (the Seinfeld ads) is actually preposterous," Mathews [MSFT VP] said. "Today was always the day. ... Media buying is something you have to do months in advance."