From under 5% to nearly 20% CTR in two quarters

For more than a year, the CTR on the promotional program sat below 5%. The team had tested subject lines, send times, creative formats, and discount depth. Individual tests produced small movements that didn't hold.

Unsubscribe rate had begun drifting upward and bounce rate was running higher than the team wanted. The internal read was that the category had matured and that sub-5% was simply the ceiling for promotional email at this scale.

Retained for two quarters, January through June, across the Q1 discounted pricing program and the Q2 spring sale.

Weeks 1–4 · Research. 22 customer interviews, SKU-level behavioral data, two years of campaign history.

Weeks 5–8 · Segmentation. The key finding: the list was sorted by discount response, never by how customers thought about value. Discount-responsiveness tiers were replaced with intent-based segments. The model was validated against historical send data before anything shipped.

Weeks 9–26 · Copy system. The first segmented campaign, in week 8, hit 8.1% CTR. Message frameworks were written separately for each segment, and a weekly test cycle ran across both campaigns. The rate didn't jump — it compounded.

Week 22 · Handover. Segmentation docs, copy system, and test protocol transferred in-house. The internal team has run the program since.

Mediasphere rebuilt the approach from the ground up: audience research, segmentation, and copy that actually matched how customers think about value. The finishing figure sat at around 20% CTR — for a promotional email channel at 1.4M active subscribers, a completely different result from where the program began.

Measured against the same two quarters the previous year.

• Click-through rate: 4.3% → 19.6%
• Revenue per email sent: $0.11 → $0.26
• Subscribe rate, monthly: 1.9% → 2.6%
• Unsubscribe rate: 0.36% → 0.17%
• Bounce rate: 1.4% → 0.6%
• Send volume, monthly: 3.1M → 3.0M

Send volume is included because segmentation can inflate CTR by mailing fewer people. Volume held flat and total clicks rose roughly four and a half times. Revenue per email more than doubled while discount depth fell five points, and unsubscribe and bounce both improved.

At first glance this was a copywriting problem. Rewriting the campaigns would have increased the numbers, but the underlying problem would still have been there. Mediasphere instead analyzed the behavioral data at hand, cataloging each customer intent and segmenting users on criteria that reflected how they actually buy.

If your promotional channel has been flat long enough that the team has stopped expecting it to move, the number is probably not the problem.