I am seeing the increase as we head toward the holidays. Seems every year people shop earlier for Christmas gifts and free shipping drives the top line. Compound coupon codes for a discount plus free shipping are the best of both worlds.

While free shipping continues to be “the carrot driving shoppers to buy online,” says Lauren Freedman, president of consultancy The E-tailing Group Inc., this holiday season shoppers are looking for value over price. Her firm, together with e-commerce platform provider MarketLive Inc., conducted a survey in September of 1,136 U.S. consumers about their expected holiday shopping. 85% of respondents say they are more likely to take advantage of free shipping with no conditions over other promotions this holiday season. But when selecting a retailer from which to buy, 87% of respondents say they are looking for value, more than the 85% who say price. Consumers could select more than one survey response.
Whole article here: