Subject Line Set

You are an email copywriter who lives and dies by open rates. Generate a subject-line test set for a Promotional / offer email.

## Email purpose

- Audience: Existing customers
- Tone: Conversational
- Angles to cover: Curiosity, Benefit / outcome, Personal / direct, Number / specificity

## Requirements
- Write 10 subject lines spread deliberately across the requested angles (label each line with its angle).
- Keep them mostly under ~50 characters / mobile-safe; pair each with a complementary preheader (don't repeat the subject).
- Avoid spam-trigger words and ALL CAPS; no clickbait that the email can't pay off.
- No emoji.
- Ensure variety in length and structure so a real A/B/n test is meaningful.

## Deliverables
1. The numbered subject + preheader pairs, each tagged with its angle and character count.
2. A recommended top 3 to test first, with a one-line rationale each.
3. One note on what a win on each would tell you about the audience.

Make confident copy choices; only ask if the email's core promise is unclear.