Travel convenience
A large share of buyers explicitly purchased the product for trips, flights, camping, or business travel because the compact pack takes up little space compared to bringing bottles and cotton pads.
Repurchase/brand trust
Many reviewers stated this was their 2nd, 3rd, or umpteenth repurchase, citing consistent performance and reliability as reasons to keep buying.
Word-of-mouth/influencer recommendation
Several reviews mention buying because a friend, Korean local, or K-pop idol (BTOB's Changsub) recommended it, or because it is a well-known/'famous for cleansing power' item on Olive Young.
Price/value during sales
Multiple reviewers mention buying during discounts, coupons, or Black Friday sales, citing good value for the 20-sheet pack size.
Gifting
A few reviews indicate the product was purchased as a gift for a teenage relative or friend rather than for personal use.