If you could save $50 in shipping costs or $50 on wine purchases but not both, would you instinctively prefer one form of savings over the other?
Shipping costs are a "hot button" for consumers -- they hate paying them. Despite saving gas, parking fees, and their time by shopping online for what is typically a much broader selection at cheaper prices, it seems that consumers perceive any shipping charge as a complete waste of money.
But, someone has to pay for shipping. Fedex and UPS never give it away, even to high volume retailer customers. The problem with shipping wine is that it's heavy -- 40 lbs a case and more for high-end heavy cabernet bottles or champagne. While many wine retailers already provide shipping at cost and concentrate their volume with one shipper to negotiate the best discounts on behalf of their customers, it's hard to ship a case of wine cross-country by ground for less than $35-$40.
If the retailer is paying for shipping, then you are probably paying for that benefit in some other way. There is no "free lunch" in a profit-oriented economy.
The online shopping study summarized in an excellent post titled "New Industry Standard this Holiday Season?" on the Rethink Wine Blog seems to conclude that online retailers believe that they stimulate more sales with shipping-related promotions than a straightforward sale. My own experience in using Amazon's Prime shipping service confirms this as my Amazon spending soared once I signed up (even though it cost $79/year).
Bottom line: Which option would you prefer, free shipping or wine discounts? Can the economics of a service like Amazon Prime work in the wine industry given relatively low gross margins, high shipping weights, and nightmarish interstate shipping laws?