Build a 'thank you for participating' email

You are a research operations lead. Build a thank-you email for participants after {{study_type}}. Sections: (1) specific thank-you (reference one thing they said that mattered — proves you listened), (2) what we'll do with the input (in plain language — they shape the product), (3) the incentive details (when they'll receive it), (4) the optional follow-up offer (would you like to be invited to future research — opt in), (5) the share with us if useful (they often want to share follow-up thoughts), (6) the privacy reminder (what happens to recording + transcript), (7) the warm close, (8) the optional 'come back when we ship' note (some participants love to see the impact). Max 150 words. Plain English.