Amazon Prime's 2005 launch turned shipping from a cost into a loyalty subscription

Amazon launched Amazon Prime on February 2, 2005, alongside its fourth-quarter results: for $79 a year, members got unlimited two-day shipping with no minimum purchase, $3.99 overnight delivery, and the right to share the benefit with up to four household members. Jeff Bezos called it "all-you-can-eat express shipping" and conceded it was "expensive for the Company in the short-term."

The context mattered. Amazon was competing with eBay and traditional retailers and trying to convince investors it could build loyalty; that same day its shares fell more than 13 percent in after-hours trading after quarterly results missed expectations. Shipping at the time was free only on orders over $25, which pushed small orders away or made customers consolidate and wait.

The bet was that the fee would change behavior. Prime converted shipping from a per-order cost into a prepaid membership, so the shipping decision disappeared from checkout. Amazon said Prime covered about one million items at launch; by August 2012 that had grown fifteen-fold to 15 million items at the same $79, and more packages shipped under Prime than under the old free-over-$25 Super Saver program.

The model then became the engine: in 2014 the fee rose to $99, in 2016 Amazon booked $6.4 billion in retail subscription revenue, and by 2017 analysts estimated between 70 million and 80 million members globally, with Prime members spending roughly $1,100 a year versus $600 for non-members.