Four-day strategy falls into the dilemma of "promotion fatigue"! Amazon Prime Day event encountered a Waterloo on the first day.

Zhtng cijng APP noted that this year, Amazon (AMZN.US) took a bold gamble by extending its annual Prime Day member day summer promotion from two days to four days, betting that a longer promotion period would allow consumers more time to browse through millions of discounted items on its massive online store. However, preliminary results show a less than optimistic situation, putting greater pressure on the remaining promotion days.