Amazon extends Prime perks to merchant sites

Amazon is extending the benefits of a Prime subscription to online stores beyond its own site, a move geared toward boosting revenue from merchant fees and expanding its logistics footprint.

The company said Thursday the new service called "Buy with Prime," will initially be available by invitation for merchants who ship their products using Amazon's warehouse and delivery services. Then, it will be rolled out for merchants who don't sell on Amazon or use its delivery services.

Amazon also said the service will only be available for U.S. customers. Launched in 2005, Prime has more than 200 million members worldwide who pay $139 a year, or $14.99 a month, for faster shipping and other perks, such as free delivery and returns.