Price and sale/bundle purchasing
Many reviewers explicitly say they bought it to hit a shipping-fee or coupon minimum, or because it was on sale, and describe it as excellent value ('coupa' cost-performance) for the amount of essence included.
Repeat/brand loyalty
A very large share of reviews are explicit repurchases, with customers saying they always buy this line whenever restocking Dermatory products or when the series goes on sale.
Influencer/word-of-mouth recommendation
Several reviewers cite recommendations from friends, Instagram influencers, or YouTube videos as the reason for trying the product for the first time.
Ingredient/functional certification reputation
Reviewers note that the different colored variants are each certified functional cosmetics (whitening, wrinkle improvement, soothing) with recognizable actives like niacinamide, centella asiatica, collagen, and hyaluronic acid, which builds purchase confidence.
Gift-giving
A few reviewers mention giving the mask to friends and receiving positive feedback, citing its 'premium feel' despite the low price.