Amazon doesn’t say how many Prime members it has, but a new estimate pegs the U.S. number at 54 million. But average spending per member declines with growth.
Amazon.com Inc. grew its Prime membership roll 35% year over year, closing 2015 with 54 million U.S. members, according to a new estimate from Consumer Intelligence Research Partners LLC, a securities research firm. That’s equal to 47% of all U.S. Amazon shoppers, the firm says.
