Billionaire activist investor Carl Icahn said Wednesday that corporate governance at e-commerce giant eBay Inc., in which he is a shareholder, was the worst he had ever seen. Ive never seen worse corporate governance than eBay, Icahn told CNBC television. Icahn, who has a 2.15 percent stake in eBay, is known for taking large stakes in companies and pushing for management change. Icahn also said that eBay chief executive John Donahoe should not have control over PayPal, the companys fast-growing payments business.