

More than half of all Amazon $AMZN customers in the US are now also Amazon Prime subscribers.
The company’s signature membership program reached that milestone in the quarter ended June 30, when 52% of Amazon shoppers were also Prime subscribers, according to data published today by Consumer Intelligence Research Partners, a firm that closely tracks Amazon’s numbers.
Prime membership in the US grew to 63 million in the second quarter of 2016, up from 44 million in the same period a year earlier, according to CIRP. As has long been true, those program subscribers also spent significantly more—an estimated $1,200 per year, versus $500 per year for non-Prime members.
In his 2016 letter to shareholders, Amazon CEO Jeff Bezos highlighted the company’s focus on Prime membership. “We want Prime to be such a good value, you’d be irresponsible not to be a member,” Bezos wrote, before listing a few of Prime’s many benefits: free two-day delivery (and same-day, in some markets), streaming video, streaming music, photo storage, and access to the Kindle lending library.
“There are now tens of millions of members worldwide,” Bezos concluded. “There’s a good chance you’re already one of them, but if you’re not—please be responsible—join Prime.”
Based on CIRP’s latest data, they are.