Write a Sales Email Sequence for Free Trial Users

Write a 7-email sequence to convert free trial users to paid customers:

Product: [SaaS or digital product — describe it briefly]
Trial length: [e.g. 14 days]
Key "aha moment": [the action that correlates with conversion — e.g. connecting a data source / publishing first project / inviting a teammate]
Primary upgrade blocker: [what stops users from converting — price / not seeing value / complexity]
Paid plan starts at: [$X/month]

Email schedule and purpose:
- Day 1 (Welcome): orient them, direct to the aha moment
- Day 2 (Tip): one specific action to get value fast
- Day 5 (Check-in): address common sticking points
- Day 7 (Midpoint): show what power users do differently
- Day 10 (Social proof): customer story relevant to their use case
- Day 13 (Urgency): trial ending — what they'll lose access to
- Day 14 (Last chance): clear upgrade CTA with a reason to act now

For each email: subject line, preview text, body (under 200 words), and single CTA.