Ahead of the festive season sale, e-commerce giant Flipkart on Friday trolled rivals Amazon and Snapdeal through a Tinder-style GIF. Titled 'Notice issued in shoppers' interest', the GIF showed a buyer 'pass' or ignore Amazon's and Snapdeal's sale, and 'like' Flipkart's sale. While Amazon's festive sale began on Saturday, Flipkart and Snapdeal's sale will begin on Sunday.