The behavioral-economics finding (Kahneman & Tversky) that people feel a loss about twice as strongly as an equivalent gain — so framing offers around what's forfeited by not acting can outperform gain-framed messaging.
When framing value props, pricing, and retention messaging; to reduce churn; in upgrade and renewal flows; whenever a gain frame underperforms.
"Don't lose your saved progress" vs "save your progress"; free trials where users build something they'd forfeit; "you're leaving $X on the table"; spelling out what a downgrade removes.
A potent framing lever in retention, subscriptions, finance, and SaaS where there's something to keep or forfeit. Use sparingly and honestly — overused, fear framing reads manipulative. Best for: retention and renewal use cases.