Replacement for JSM cushion
The single most common purchase driver is owning a JUNGSAEMMOOL cushion foundation and needing spare or replacement puffs, as many note the puff wears out or gets dirty.
Hygiene and frequent swapping
Multiple reviewers, especially Japanese buyers, wash their puff every 2-3 days and want a stock of extras on hand, or prefer replacing rather than washing.
Repeat/loyal purchase
Many describe themselves as long-time JSM users who repurchase puffs regularly, citing consistent quality and it being their 'go-to' puff.
Cross-brand compatibility
Some buyers purchase this puff to upgrade or replace puffs in other cushion compacts (HERA, Dior, Clio, TIRTIR) because they find it superior to what came included.
Value/sale pricing
Several reviews mention buying during a discount or sale, or citing it as a good price for the quantity (2P/4P packs).