“The three biggest retailers by revenue in the U.S.—Costco, Walmart, Amazon AMZN accounted for about 11% of total retail sales back in 2014, based on their reported figures measured against national retail sales data from the Commerce Department. Their share of the market has been growing since then. In their last three reported quarters, the behemoths selling everything from groceries to appliances made up about 17% of retail sales and roughly 57% of retail sales growth over that period.”

Grocery has been the hardest hit declining from 66% to 54% but add in the other major players in off-price such as TJ Maxx as specialty shrinks…it isn’t pretty. When noting likelihood of membership renewal, this trend is here to stay and arguably will further accelerate.