Noom Email — "My gift to you..."

Why it works

A promo email Noom sends quiz-takers who left without paying, five hours after its first ("Your customized course is ready"): "Your Promo Code: T8A-CZEEE. Offer ends in: 48 hours", "try Noom risk free for 14-days. Plus you'll get 3 months of your 6-month course for free". The body sells the method rather than the price ("Noom starts with the 'why' behind your habits"), and links "your brand-new course #1768SFJ91", a different number from the #3554SFJ91 that first email called yours.