The event was double the length of the previous year, though, so "anything else would be a big disappointment," one analyst said.

In lieu of specific numbers from Amazon, Adobe’s insights into broader ecommerce spending during the Prime Day period — which cover over 1 trillion visits to U.S. retail sites, 100 million SKUs and 18 product categories — offer the best, most quantifiable view into consumer behaviors during this critical summer shopping moment.