Science in Sport
Measurement Document 1 of 1
EMAIL WAR ROOM
20 Jul 2026DOCX
Topic MEASUREMENT
Owner martin.lucas@cotngroup.com
File Type DOCX
Last Modified 20 Jul 2026
Document 01 of 01
MEASUREMENT

EMAIL WAR ROOM

Email performance vs the Brand Brain: what's working, what isn't, and the revenue trapped between them.

File Type
DOCX
Owner
martin.lucas@cotngroup.com
Last Modified
20 Jul 2026
Topic
MEASUREMENT
SENTOPEN RATECLICK-TO-OPENREVENUE / 1000
15.9M across 61 sends29.1% healthy — the list opens0.86% the leak — they don't act£3.99 · £63.5k total direct
The one-line verdict

The list is healthy and the top of the funnel works — a 29% open rate on a 15.9M-send volume is a brand people still want to hear from. Everything breaks at the click. A 0.86% click-to-open means that for every 100 people who open, fewer than one acts. The emails are earning £4 per thousand sent when the same brand's tighter, product-led sends earn three to four times that. The database is being treated as one undifferentiated list of 15.9M — the four economies the CRM-OS defines (Champions, Mid-Tier, At-Risk, Dormant) are written down but not being used. The revenue isn't missing because the audience is cold. It's missing because the mechanics after the open are built for broadcast, not for a person.

Nearly half of all sends earn under £3 per thousand. A handful of product-led and tight-list sends clear the US benchmark. The account average sits low because the losing half drags it down — not because there's no ceiling.

1 · What's working
The list still opens — that's the asset to protect

29.1% average open across 15.9M sends is genuinely strong for a base this size. Deliverability is clean (99.7%), hard bounces are negligible, and unsubscribe sits at 0.20% per send. The brand equity is intact. This is the foundation everything else gets built on — do not burn it with more undifferentiated volume.

Product-led wins at scale — the top and bottom sends prove it

Product-led sends out-earn editorial £5.17 vs £2.94 per thousand — a 1.8× gap. Comparing like-for-like mass sends (50k+ recipients), the top earners are almost entirely product-led; the bottom are almost entirely story/editorial.

REV/1kTOP SENDS (50k+ recipients)OPENCTOTYPE
£12.87Your free fuel is waiting26.7%1.53%Product
£7.77New cycling packs have arrived27.6%1.07%Product
£7.52Fuel your session: GO or BETA?28.7%0.95%Product
£7.33Creatine for endurance athletes29.7%2.08%Product
£7.12The ultimate guide to energy gels27.6%1.06%Product
REV/1kBOTTOM SENDS (50k+ recipients)OPENCTOTYPE
£0.86The future of HYROX fuelling27.1%0.55%Editorial
£1.02The common mistakes on race day28.3%0.57%Editorial
£1.59Inside the Austin marathon29.0%0.38%Editorial
£1.90Fuelling the work with Nick Bester27.2%0.48%Editorial
£2.05Race week nutrition: a day-by-day protocol28.5%0.79%Editorial

Opens are near-identical top and bottom (27–29%). The entire gap is in the click and the offer — the story sends open fine, then give the reader nothing to do. The rule isn't "editorial is bad": it's that product must arrive as the answer, or the open never becomes a click.

Smaller, warmer lists massively outperform — the segmentation proof is already in your own data

You don't need a test to prove segmentation works. It's already visible in the regional splits:

REGIONAVG LISTOPENREV/1kWHAT IT SHOWS
UK301,50328.8%£3.91Mass blast. The baseline problem.
US23,03351.5%£7.64Tighter list → 2× the open, 2× the revenue.
EU27,64525.7%£17.17Product-led + tight = 4× UK rev/1k.

And the UK "Part 2" resends to prior openers hit 82–88% open rates. Warm, relevant, targeted sends are already winning inside this account. The playbook isn't unknown — it's just not being applied to the 15M UK volume.

2 · What's not working
The click is where the money leaks — not the open

29% open, 0.86% click-to-open. Only 0.031% of opens become an order. The subject lines are doing their job; the email body, the CTA, and the offer are not carrying the opener across the line. In Central Brain terms, the emails win the trigger but never build the desire or close the action — they inform and then send people away instead of making one clear, rewarded ask.

The database is one list, not four economies

The CRM-OS is explicit: the base is four psychological economies, each needing different language, timing, incentive and offer. The email data shows the opposite — 45 of 61 sends went to 250,000+ recipients, near-universal blasts. Champions are getting the same generic editorial as Dormant. That is the single biggest structural miss, and it's costing money at both ends:

SEGMENTSHAREWHAT THE BLAST DOES WRONG
Champions1.0%Sent generic promos the OS says to NEVER send them. Should get routine / subscription / "never miss a session". Discount scores 2/10 for them.
Active Mid-Tier7.6%The growth engine — future Champions. Needs proof + progress + peer identity. Gets undifferentiated editorial instead.
At-Risk3.2%Highest retention opportunity. Needs win-back timing, not the same weekly newsletter everyone gets.
Dormant88.1%Most of the 15.9M volume. Blasting them weekly drives the unsubscribes and depresses the whole account's rev/1k.
Volume is buying attrition, not revenue

31,911 people unsubscribed over the period — a permanent asset being spent to send low-relevance mass editorial. Every blast to the 88% Dormant pool that isn't sharply reactivation-led is trading a future customer for near-zero revenue today. The bottom 10 sends (all 50k+, all editorial/story) earned £0.86–£2.05 per thousand — they cost list health and returned almost nothing.

The Sunday / revenue-slot discipline isn't visible

Best-day-to-send logic (purchase intent on the eve of the peak buy day; awareness earlier in the week) doesn't appear to be governing the calendar. Sends are cadence-driven, not intent-timed. This is a fixable overlay, not a rebuild.

3 · The revenue trapped between them — modelled

This isn't a cold-audience problem, so the fix isn't more sends. The UK book runs at £3.91 per thousand; the tighter US sends run at £7.64. Modelling the UK volume (15.7M sends, £61,315 direct over the 6.5-month period) at improved rev/1k, annualised ×1.85:

SCENARIOREV/1kPERIOD UK REVANNUALISED UPLIFT
Current (baseline)£3.91£61,315
Conservative — half the gap to US£5.78£90,572+£54,000 / yr
Full — UK matches US rev/1k£7.64£119,828+£108,000 / yr

Assumptions, stated plainly: US rev/1k is treated as the achievable ceiling because it's the same brand, same products, tighter list; the conservative case assumes we close only half that gap; annualisation scales the 6.5-month actual to 12 months at flat volume. No extra sends, no extra media — this is reallocation and segmentation of what already goes out.

The headline for the client: even the conservative case adds ~£54k/year to the UK book by segmenting the base and letting the product be the answer. The segments exist on paper. The money is in switching them on.
One honest caveat on the evidence

This export contains sends, opens, clicks and revenue — not a per-send CRM segment field. So "Champions are getting generic blasts" is inferred from send size (a 340k send cannot be segment-targeted), not read from a segment label. It's a safe inference, but to make it airtight for the client we'd confirm it with the DotDigital audience/segment attached to each campaign. Everything else in this document is computed directly from the file.

4 · War room — do this next
#ACTIONSEGMENTWHY
1Stop blasting the full base. Split every send by the four CRM-OS economies before it goes out.All fourBiggest structural lift. US/EU splits already prove it.
2Fix the click: one clear, rewarded CTA per email, product as the answer, star-rating/social proof at the point of decision.All0.86% CTO is the leak. Trigger works; close doesn't.
3Give Champions their own stream: routine, subscription, "never miss a session". Never generic promos.Champions 1%Protect the highest-value habit buyers.
4Build a Mid-Tier progress series: proof + peer identity + "you're becoming a runner". This is the growth engine.Mid-Tier 7.6%Where tomorrow's Champions come from.
5Reactivation-only logic for Dormant — sharp, selective, not weekly editorial. Suppress the rest to stop attrition.Dormant 88%Stops the 31,911-and-rising unsubscribe bleed.
6Rebalance the calendar toward product-led; reserve intent-timed slots for purchase sends.All2.5× rev/1k, reallocation not new spend.
Central Brain read: the list opens because the brand is trusted. It doesn't click because every email speaks to everyone. Segment the base, make one rewarded ask, let the product be the answer — the revenue is already in the room.