Lydia E. Pinkhams cures and claims
The pattern
This still is filed under Keepable trade card.
Define
A small card people keep (pretty, useful, or collectible) that carries the brand after the encounter.
Mechanism
Retention object. The gift is the media. Recall is paid for by usefulness or delight, not by repetition.
Verdict
We can put a physical or digital keepable in someone's pocket and they will not throw it away.
Why it works
It lists every possible symptom women might be too embarrassed to discuss with male doctors, offering a universal, discreet solution by mail.
Steal this when
When selling a panacea or comprehensive solution to a highly specific but broad demographic.