Amazon Prime, Amazon's $99-per-year loyalty program, now has 54 million US members, according to a new analysis from Consumer Intelligence Research Partners (CIRP).
That's up 35% from this time last year (per CIRP estimates). Amazon doesn't reveal anything but the hazy "tens of millions" when talking about Prime subscribers.
Of the 14 million members that Amazon added in 2015, 7 million joined during the fourth-quarter holiday season. That could mean good news for Amazon ahead of its Q4 2015 earnings report this week.