Amazon tried to grow the sales of its private label brands, like AmazonBasics, by adding more products. But rather than juice sales, it’s created new headaches — especially with regulators. WSJ’s Dana Mattioli explains why Amazon is starting to scale back. Further Reading: - Amazon Scooped Up Data From Its Own Sellers to Launch Competing Products  - Amazon Has Been Slashing Private-Label Selection Amid Weak Sales  Further Listening: - ​​How Amazon Employees Used Sellers' Data Against Them  Learn more about your ad choices. Visit megaphone.fm/adchoices