Sale/discount pricing on the triple set
Many reviewers explicitly say they bought or stocked up because of Olive Young sales, coupons, or 1+1 promotions that made the triple 30ml set very affordable.
Repeat/loyal purchase
A large share of reviews mention this being their 2nd, 3rd, or even 10th+ repurchase, describing it as a 'holy grail' or staple they always keep in stock.
Reputation and word-of-mouth/ranking
Several buyers cite the product's high ranking in Korean beauty charts, recommendations from friends, family, or Olive Young staff, and general hype as reasons for trying it.
Suitability for dry/sensitive skin
Many purchased specifically because they have dry, sensitive, or post-treatment (laser/needling/retinol/BHA) skin and were looking for a strong hydrating and soothing ampoule.
Value/bundle size for gifting or family use
Reviewers mention buying it as gifts (e.g., for a mother-in-law) or purchasing extra sets for family members, and appreciate that the large triple set lasts a long time.