Youku.com (NASDAQ:YOKU) shares are trading 4% lower despite news that it has landed exclusive Chinese online distribution rights from CBS (NYSE:CBS) for 2 seasons of Survivor and America’s Next Top Model, in an effort to increase its professional content portfolio.The shows will be offered as an ad-supported basis.However, there has been speculation that Youku and its competitors would choose for pay-per-view model in order to deal with rising content costs.