https://techcrunch.com/2018/07/18/prime-day-boosted-other-large-retailers-sales-by-54-says-report/

Amazon’s Prime Day again broke records this year, but the sales holiday also boosted sales across the broader U.S. e-commerce industry. According to Adobe Analytics data released this morning, larger retailers – meaning those with over a billion in annual revenue – saw a 54 percent increase in sales on Prime Day, compared with an average Tuesday. This is attributed to increased conversions on their own sites, Adobe says.

Though not highlighted in Adobe’s report, Target announced that its one-day sale held on Tuesday was the biggest online shopping day of 2018, in terms of both traffic and sales. “Millions” of guests shopped its site, and “millions” of orders are now being fulfilled, it said. Of note, 90 percent of those online orders are being fulfilled by Target stores – a different model than Amazon.