Brand/ingredient reputation (Galactomyces + Niacinamide)
Many buyers already use or love ma:nyo's Galac Niacin ampoule/serum and bought the mask to experience the same ingredient in sheet form or as a lighter alternative.
Trial size / low commitment
A large share of reviewers bought a single sheet to test compatibility before committing to the full-size ampoule, citing it as a more affordable way to sample the brand.
Free shipping add-on
Several reviews explicitly say they added the mask just to reach the free-shipping threshold, indicating it's a common impulse/add-on purchase on Korean marketplaces.
Repurchase/loyalty
Many long-time users report repeatedly repurchasing after positive experience with brightening and hydration, and some regret not buying in bulk multi-packs.
Recommendations and word-of-mouth
Reviewers mention buying based on friend recommendations, popularity/fame of the product, or having heard 'great reviews,' especially during sales/promotions.