http://www.marketwire.com/press-release/Successful-Retailers-Use-Sales-Email-Promotions-Free-Shipping-Attract-Shoppers-1560467.htm
Email, social networking influence purchase decisions; SMS use by retailers remains relatively low.
35 percent of respondents say that Twitter feeds have been influential or extremely influential on purchase decisions, while 23.5 percent say that Facebook has been influential or extremely influential on purchase decisions.
Consumers save with sales, coupons and deal promotions.
Free shipping inspires more online purchasing, less shopping cart abandonment.