How come only 0.08% of Snapchat’s users bought its camera sunglasses? Hundreds of thousands of pairs of Spectacles sit rotting in warehouses after the company bungled the launch. Initial hype and lines for its roving, limited time only Snapbot vending machines led Snap to overestimate demand but underdeliver on quality and content.

Massive piles of assembled and unassembled video-recording sunglasses sit unsold, contributing to Snap’s enormous costs and losses, says The Information. [1]Internal Snap data shows less than 50 percent of buyers kept using Spectacles a month after purchase, Business Insider’s Alex Heath reports.[2] A “sizeable” percentage stopped after just a week, with a source calling the retention rate “shockingly low”.

What was the problem? Snap generated huge hype for Spectacles, but then waited 5 months to openly sell them. Once people actually tried Spectacles, few kept wearing them, and word of mouth about their disuse spread. Snap never got visionary video markers onboard. And as Snapchat’s popularity waned in the face of competitors, the fact that Spectacles only interfaced with its app rather than a phone’s camera roll became a burden.

Snap did some things right with Spectacles. The fashion photo spread announcement felt classy and surprising despite clues and photos of CEO Evan Spiegel trickling out ahead. The initial launch was a marketing extravaganza, with multi-hour lines of cool kids waiting on the Venice Beach boardwalk to buy them. And the Snapbots being dropped in random locations was exciting and made people feel special if they got ahold of them. But once people put them on their face, the excitement died off.

Karl Lagerfeld’s photo of Snap CEO Evan Spiegel donning Spectacles for their September 2016 reveal

Here’s a breakdown of the major flaws that emerged...

Read more from our friends at TechCrunch