The difference is amazing when you can segment away your best customers:
We know that, on average, Prime members spend more on Amazon than non-Prime members (which is expected), but we don’t know how much those Prime members are converting searches to purchases. Well, a new report from Millward Brown Digital estimates that when compared to non-Prime members, Amazon’s most “Prime” customers are converting those purchases 74 percent of the time, Internet Retailer reported.
In contrast, that compares to non-Prime member estimated conversion rates of 13 percent, according to Millward Brown Digital, which is a website traffic measurement firm. Its most recent research also suggests that Prime member’s conversion rate is 22 times higher than the typical eCommerce conversion rate in the U.S.