https://phys.org/news/2018-07-amazon-upbeat-prime-day-early.html

Amazon said it was resolving the glitches and in a tweet Tuesday lauded Prime Day growth in the first ten hours compared to last year. The event is in four new countries this year and it's running longer.

The hiccups, though, could have sent shoppers elsewhere during a key period when Amazon signs up new Prime members. Many other chains offered sales and promotions to try to capitalize on the Prime Day spending.