NEW YORK Amazon (AMZN) is trying to lure more subscribers to its $99 Prime loyalty program by pushing a day of discounts it calls "Prime Day" during the sleepier summer shopping season. The e-commerce retailer plans to offer thousands of deals on July 15 in the nine countries that have the Prime loyalty program, including the U.S., U.K., Spain, Japan, Italy, Germany, France, Canada and Austria. The Seattle company says the promotion...