An empirical study on key drivers of blind box online purchase experience based on online reviews: integrating the Kano model and entropy weight method

Why Mystery Boxes Matter to Online Shoppers

Blind boxes—sealed packages where you do not know exactly which toy or collectible you will get—have become a craze among young people, especially online. The thrill of surprise, the joy of collecting, and the fun of sharing with friends make them more than simple products. But many buyers also report disappointment, feeling cheated when the item does not match the pictures or arrives damaged. This study asks a practical question: when people buy blind boxes online, what aspects of the experience truly make or break their satisfaction, and how should companies prioritize improvements?

From Online Comments to Clear Signals

Instead of relying only on small surveys, the researchers started with the voices of real consumers. They collected nearly nineteen thousand reviews about blind boxes from major Chinese e‑commerce platforms. Using text‑mining software, they extracted the most common words and how those words clustered together. Four big themes emerged: the actual quality of the product, the smoothness of the shopping and delivery process, whether the box feels worth the money, and the emotional and social side—gifts, fun, surprise, and sharing with friends. Within these themes, they distilled nineteen concrete factors, such as whether the toy matches its photo, how fast it ships, how sturdy the packaging is, and whether opening the box feels exciting or disappointing.

Sorting Essentials from Extras

Next, the team asked 305 experienced blind‑box buyers to rate each of the nineteen factors using the Kano model, a well‑known tool in product design. This model separates basic must‑haves from performance features that linearly increase satisfaction, and from attractive extras that delight but are not expected. The study found that matching product photos, fast delivery, and elements tied to gifting and collecting form the must‑have “trust baseline” for blind boxes. People may accept not knowing exactly which figure they will receive, but they do not accept feeling misled by pictures, slow or risky shipping, or a flat, unceremonious unboxing.

What Really Drives Delight or Disappointment

The analysis showed that some factors directly push satisfaction up or down as they improve or worsen. These “performance” factors include cost‑effectiveness, consistency of quality, workmanship and feel, authenticity, and how well the box meets opening expectations. If these are good, buyers are happy; if they are poor, complaints spike. Other factors, such as design safety, robust packaging, and strong protection during transport, fall into the “attractive” group. They do not motivate the purchase by themselves, but when done well they create a sense of extra care and security, especially important when children are involved.

Hidden Risks in Overlooked Details

Some elements, like after‑sales service, brand labels, and social sharing, appeared “indifferent” on average—they did not clearly raise or lower satisfaction for most people. Yet a second method, the entropy weight approach, told a subtler story. It measured how much opinions about each factor varied. After‑sales service showed extremely high variation: many people barely noticed it, but for those who faced problems such as defects or suspected counterfeits, it mattered greatly. This means that a company might wrongly treat after‑sales support as low priority if it looks only at average effects, even though it is crucial for preventing trust breakdowns when things go wrong.

What This Means for Shoppers and Brands

For everyday buyers, the study explains why some blind box experiences feel magical while others feel like a scam. The joy of surprise only works when a solid floor of trust is in place: what you see online must match what you get, the box should arrive quickly and safely, and the unboxing should feel like a small event, not a disappointment. Once those basics are met, people judge whether the toy feels worth the price and whether its quality, feel, and design live up to expectations. Safety and protection add a layer of comfort, and responsive help when problems arise can rescue shaky experiences. For brands, the message is clear: treat trust‑building basics as non‑negotiable, tune price and quality as the main levers of satisfaction, use safety and sturdiness to stand out, and never ignore after‑sales service, even if it looks unimportant at first glance.

Citation: Feng, YL., You, YQ. & Guan, SS. An empirical study on key drivers of blind box online purchase experience based on online reviews: integrating the Kano model and entropy weight method. Sci Rep 16, 9743 (2026). https://doi.org/10.1038/s41598-026-44771-3

Keywords: blind box, online shopping experience, customer satisfaction, Kano model, e-commerce reviews