An estimated 60 percent of U.S. adults are Prime members–that includes 82 percent of households with income over $150,000. A survey by Consumer Intelligence Research Partners revealed 93 percent of Prime members keep their subscription after their first year, 98 percent do after their second year, and Prime members spend on average $1400 a year on Amazon purchases, compared with $600 by nonmembers.
Source: Cracking the Leviathan: Workers at Amazon – CounterPunch.org
1848+: The End(s) of History 