Subject lines for customer reactivation sequences.
Winback subject lines work best when they ask a question rather than make a claim. 'Still using your {{lastPurchase}}?' beats '20% off to come back' on opens, replies, and downstream LTV by wide margins. The question framing acknowledges the customer's choice to lapse and invites them to respond honestly. Discount-led winback subjects work, but they should be the late-sequence move, not the opener. 'We probably need to break up' as the deep-lapse subject earns surprising response rates — counterintuitively, permission to leave generates more re-engagement than guilt-trip subjects. For SaaS cancel-winback, naming the cancel date in the subject ('You canceled {{paidTier}} on {{date}} — quick question') signals that this isn't an automated blast and lifts response rates substantially.
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