Repurchase / loyal use
An unusually high share of reviewers mention buying this multiple times (2nd–20th bottle), indicating strong repeat-purchase behavior driven by perceived efficacy.
Viral/influencer exposure
Reviewers cite BTS member Jung Kook and TikTok creator HEYINN as reasons they tried the product, suggesting celebrity and influencer marketing meaningfully drives trial.
Fast, targeted acne relief reputation
Many buyers purchased specifically as an 'emergency' spot treatment for sudden breakouts, cystic acne, or before important events, based on its reputation for calming acne overnight.
Gifting
Several reviewers bought it for family members (sons, daughters, siblings, friends) struggling with acne, indicating it's seen as a trustworthy gift item.
Brand trust / ISOI reputation
Some buyers cite prior positive experience with other ISOI products (e.g., the acne pack) as a reason to trust and purchase this spot treatment.