$ 0 0 David Marcus, who has led eBay Inc's fast-growing payments unitPayPal for the past two years, will step down this month to run Facebook Inc's Image may be NSFW. Clik here to view. EBay shares fell a little more than 2% in trading after hours. Under Marcus, PayPal has moved more aggressively into the physical world by developing a mobile wallet for consumers as well as point-of-sale systems for retailers. Image may be NSFW. Clik here to view. The move comes as PayPal, which has 148 million active users, faces tougher global competition from Amazon.com Inc, which launched a recurring payments program earlier on Monday, as well as Chinese e-commerce giant Alibaba Group Holdings Ltd, which is going public later this year. Image may be NSFW. Clik here to view. In a blog post, eBay Chief Executive John Donahoe said Marcus was leaving behind a strong leadership team and PayPal was on track to meet its outlook for 2015.Image may be NSFW. Clik here to view.