Trouble on the site spiked just as the event began at 3 p.m.
Shoppers took to social media to complain that they couldn't order any items. Amazon's stock was little changed at US$1,817.15 at 9:46 a.m.in NY.
Despite the bust out of the gate, the company said it sold more items in the first hour of Prime Day this year than in the first four hours of last year's event. The company also is airing live Prime Day programming at amazon.com/primeday where hosts reveal top deals, shopping tips, and trends during peak shopping times.
"Amazon is a fair and responsible employer and as such we are committed to dialogue, which is an inseparable part of our culture, " spokeswoman Melanie Etches said in an email.
According to DownDector.com, Amazon outages were reported across the country, including in the Northeast and along the West Coast.
Spanish workers are on a three-day strike, while Polish workers will stage a work slowdown, known as work-to-rule, according to Reuters.
Monday also saw Amazon's market capitalisation rise to $888bn, making it the world's second most valuable company after tech giant Apple, valued at $940bn. This Prime Day sale gives subscribers access to over 200 exclusive new Prime Day launches.
And also new this year is a section on Whole Foods, where Prime members will save 10% if they spend $35.
Amazon said it expected only a fraction of its 12,000 workers in Germany to join the strike, and that there would be no impact on Prime Day deliveries. However, before you click on the purchase button, you might want to check if the same product is available on eBay first.
This is a partial list of Amazon-brand devices that are on sale right now. In the meantime, Amazon is giving shoppers a heads up on some upcoming bargains.
"I'm sure they are working furiously and many heads are rolling", she said. Yes, there will be Black Friday and Cyber Monday, but wouldn't it be nice to get the shopping out of the way now?
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