The problems persisted several hours after the company acknowledged the issue. As of 7:30 p.m. EDT, some users were still getting error pages when attempting to order products.
For some, the front page was on a loop. The site refreshed itself over and over again, teasing customers about the $30 Echo Dot, but not allowing them to even add it to the cart.
For others, Amazon immediately reverted to an error page with images of dogs owned by Amazon employees that linked to a company careers page. A tease, of course, but one that may be better than the endless loop.
For others, the Amazon site being down saved them money since they couldn't order anything.
Amazon might also be guilty of turning customers into cat people.
Prime Day has become the company's largest shopping day, but is perhaps even more important as a means of encouraging more people to sign up for Prime memberships.
Amazon finally tweeted about the issue at 5:00 p.m. ET, two hours after the event began, and a spokesperson responded with the same statement.
Amazon shares rose 0.5% to $1822.49 on Monday, but were trading down 1.5% in after-hours trading.