Consumer Intelligence Research Partners 50-million-plus Prime members 54 million Prime members in the US 54 million Prime members in the US 54 million Prime members in the US 54 million Prime members in the US analysis done by Consumer Intelligence Retail Partners 54 million Prime members 54 million Prime members in the US 54 million customers Consumer Intelligence Research Partners Consumer Intelligence Research Partners Consumer Intelligence Research Partners Consumer Intelligence Research Partners fool analysis by Consumer Intelligence Research Partners (CIRP) 54 million Prime members Amazon Prime that grew from 54 million members David Kline writes spend a LOT more increased dramatically over the past year increased dramatically over the past year 54 million customers Consumer Intelligence Research Partners Consumer Intelligence Research Partners 54 million Consumer Intelligence Research Partners 54 million subscribers 54 million Prime members in the US 54 million Prime members in the US Prime members 55 million users popularity of Amazon Prime Consumer Intelligence Research Partners