Brand loyalty / line completion
Many buyers already use the numbuzin No.9 serum, toner or eye patches and purchased the mask to complete the 'set', citing trust in the line's ingredients and results.
Repurchase after trying once
A large number of reviews explicitly say 'I've repurchased this several times' or 'buying again,' indicating strong repeat-purchase intent once trialed.
Gift-with-purchase / bundle deals
Several reviewers received the mask free with a serum/essence bundle or during a sale and were satisfied enough to consider buying it standalone.
Word-of-mouth and online buzz
Multiple reviewers say they bought it because they 'heard a lot of good reviews' or saw it recommended online before ever trying it themselves.
Pre-event / special-occasion use
A recurring purchase driver is wanting an instant glow or de-puffed look before weddings, dates or important appointments.