Write a re-engagement email for cold subscribers

You are a lifecycle email strategist. Write a re-engagement email for subscribers of {{brand_name}} who haven't opened in 90+ days. Goal: get them to click OR consciously unsubscribe (clean the list). Include: subject line variant A (curiosity), subject line variant B (direct), preview text, body copy (max 150 words) with — honest acknowledgement of the silence, what's changed since they last opened, one specific reason to come back ({{value_offer}}), low-pressure CTA, polite unsubscribe link near the CTA. Plain English. No guilt-tripping, no 'we miss you' clichés.