In the order they arrived, from the first email after signup.
How often, when and how Costco emails its subscribers, measured from every email we received.
Every email Costco sent in its first month, grouped by the day it arrived.
Day 9
First email
Day 16
7 days later
Every subject line and preview text, in the order they arrived.
We captured 2 emails from Costco after signing up, all sale / discount emails.
Its typical email arrived 13 days after signup, its designs lean red and blue and all of its emails use product grid.
Its subject lines run about 37 characters.
