"It is not clear how this holiday season performed," said Gustavo Gomez, director of research and methodology at Envirosell, New York. "As the number keep coming in from different sources what is clear is that there are many winners (Amazon seems to be a big one) and losers (seasonal apparel in the United States).

"An after holiday sales is standard for most retailers, but luxury brands have to be careful not to dilute the brand equity with excessive markdowns," he said. "Seventy percent off seems excessive."

https://www.luxurydaily.com/retailers-spur-mid-winter-spending-with-deep-discounts/