Write a Newsletter Growth Email

Write an email designed to get current subscribers to refer new subscribers:

Newsletter name: [name]
Subscriber count: [approximate]
What makes this newsletter worth sharing: [the unique value it provides]
Referral incentive (if any): [bonus content / shoutout / physical reward / nothing]
Referral mechanism: [SparkLoop / manual / custom link]

Write:
1. The referral ask email (standalone send):
   - Subject line (3 options)
   - Opening: remind them why they subscribed and why they value it
   - The ask: specific and makes sharing feel easy, not like a favour
   - Social copy they can copy-paste for Twitter/LinkedIn
   - The incentive explained clearly (or why you're asking without one)
   - CTA with their unique referral link [PLACEHOLDER]
   - Under 300 words

2. P.S. line for regular issues:
   - 3 variations of a P.S. that organically mentions the referral programme without feeling pushy

3. Referral milestone email:
   - For when someone hits their first referral — celebrate it and encourage more