Walmart fumbles in the battle for wealthy shoppers

Jetblack was only available in New York City. Still, "in a city of 8+ million people, fewer than 1,000 were signed up for Jetblack as of last year," according to Retail Brew.

The big picture: Walmart and Amazon have long dominated two different cohorts of shoppers. While Walmart reigns over redder, more rural and lower-income America, Amazon commands the larger, liberal metros.

• But recently, as each behemoth seeks to own the future of retail, they've been stepping on each other's toes.
• Walmart's Jetblack was its signature attempt to crack the market of the very wealthiest American shoppers, many of whom are already Prime members. But Amazon's ubiquitousness in big cities and among wealthier consumers is difficult to crack.