Habitual repurchase / brand loyalty
A very large share of reviewers explicitly say this is their 'go-to' or 'favorite' mask and have repurchased for months or years (one reviewer notes 3 years of continuous purchase).
Sale/discount pricing
Many buyers say they stock up (10-30 packs) specifically during Olive Young or platform sales because the per-sheet price becomes very low (~100 JPY/sheet mentioned).
Word of mouth / ranking visibility
Several Japanese and Korean reviewers cite seeing the product ranked highly or recommended by others as the reason for a first purchase.
Ingredient reputation (Madecassoside/Centella)
Buyers with sensitive or acne-prone skin specifically sought out the madecassoside (centella) formulation for its soothing reputation, sometimes after seeing an ad.
Gifting
Multiple reviewers bought boxes to give to family or friends, noting the masks are 'universally good' and well received as gifts.