&quot;Amazon doesn&#x27;t disclose Prime membership numbers&quot;<p>&quot;The numbers were based on surveys of 500 U.S. residents who made a purchase at Amazon.com in the period from October-December 2015&quot;<p>Lot of bold claims here. Just a few ways off the top of my head for why this estimate is ridiculous:<p>- People who use the Internet are more likely to be Prime members. We have elderly people here.<p>- People who&#x27;ve made a purchase on Amazon are more likely to report being prime members.<p>- People who made a purchase during the holidays are far more likely to be Prime members (I was a Prime member this holiday season, because I finally cashed in my free month and cancelled).<p>- 500 people is far too low a number to extrapolate such a bold claim about Americans.<p>- I&#x27;d even argue that people who fill out surveys may be more likely to be Prime members.<p>In short, Consumer Intelligence Research Partners sounds like a joke.