Have you bought your bond? Liberty Loan - Subscriptions received here" poster
The pattern
This still is filed under War-bond ask.
Define
Money is requested as duty. The instrument is financial. The motive is belonging to the effort.
Mechanism
Civic purchase. The buyer is not shopping. They are enlisting with a wallet. Price is framed as participation.
Verdict
A public or communal instrument needs wide subscription and the stake is genuinely shared.
Why it works
It uses a direct question with a recognizable national symbol to provoke a sense of duty. The large question mark makes the challenge personal.
Steal this when
You want to confront the audience directly about their participation or commitment to a cause.