Latest / The Newsletter Podcast with Fexingo: Substack, Beehiiv, and Email Newsletter Business / Why Your Newsletter Needs a Metrics Dashboard Not Just a Growth Number
Transcript
- Lucas: You know, Luna, I was talking to a friend who runs a pretty successful B2B newsletter — about twelve thousand subscribers, decent niche in supply chain tech. And he told me something that stopped me cold. Luna: I'm listening. Lucas: He said his revenue actually dropped last quarter. But his subscriber count went up ten percent. More readers, less money. And when I asked why, he said he had no idea. He was tracking one number: total subscribers. That's it. Luna: Ouch. So he was driving in the dark with only a speedometer — no fuel gauge, no map. Lucas: Exactly. And that's what we're talking about today: why the single most important thing for a newsletter business isn't just growth — it's having the right dashboard. Knowing which metrics actually predict revenue and retention, versus the ones that just make you feel good. Luna: So what should be on that dashboard? If someone's starting from scratch, what are the first three numbers they should track? Lucas: Let's start with open rate — but not the way most people think about it. Most newsletter writers look at their last send's open rate. That's almost useless because it varies so much by subject line, send time, day of the week. What matters is the trend over the last thirty days, and specifically the decay curve. Luna: Decay curve meaning how fast open rates drop as you send more emails to the same list? Lucas: Right. If you have a list of ten thousand and you send daily, a healthy open rate decay might go from forty percent on day one to thirty percent after a month. But if it drops to fifteen percent in two weeks, that's a signal that your content isn't matching expectations, or you're sending too often. My friend never looked at that. He only checked the latest send, thought it looked fine, and moved on. Luna: And what's the second number? Lucas: click to conversion ratio. Not click-through rate, but the percentage of people who click a link and then take the action you want — buy something, sign up for a webinar, fill out a form. A lot of newsletters have great click-through rates but terrible conversion because the link goes to a bad landing page or the offer isn't compelling. Luna: So it's not about getting clicks, it's about getting the right clicks. Lucas: Exactly. And the third number is churn rate — the percentage of subscribers who unsubscribe or go inactive each month. Most people track growth, but they don't track leakage. If you're adding five hundred subscribers a month but losing four hundred, you're barely treading water. Luna: And that's exactly what was happening to my friend. He was adding subscribers through a referral program, but his content wasn't engaging the existing ones, so they were dropping off. He just didn't see it because he was looking at the net number. Lucas: Right. So let's get specific. I want to walk through a real example — a newsletter we'll call 'Supply Chain Signals.' It's B2B, about twelve thousand subscribers, sends twice a week. The writer was making about three thousand dollars a month from sponsorships and a small paid tier. After building a proper dashboard, she increased revenue to forty-two hundred a month within three months — a forty percent jump. Luna: Forty percent? That's huge. What did she change? Lucas: First thing she noticed was that her open rate decay curve was steep — dropping from forty-two percent to twenty-two percent over four weeks. That told her she was over-sending to people who weren't interested in every topic. So she introduced a preference center where subscribers could choose between 'weekly digest' and 'twice-weekly deep dives.' Luna: Let me guess — the people who chose the twice-weekly option had much higher engagement. Lucas: Exactly. Open rates for the digest group stabilized around thirty-eight percent, and the deep-dive group stayed above fifty percent. But the key was that overall list churn dropped from about six percent per month to two point five percent. She kept more of what she had. Luna: And the click to conversion ratio — she looked at that too? Lucas: She did. She realized her sponsorship clicks were high — around eight percent — but only one percent of those clicks actually led to a demo sign-up for the sponsor. So she worked with sponsors to improve their landing pages and made sure the link in her newsletter went directly to a sign-up form rather than a generic homepage. That pushed conversion to three point five percent. Luna: So sponsors got better results, and she could charge more for the next campaign. That's the flywheel. Lucas: Exactly. And the third change was around churn. She started a re-engagement campaign for subscribers who hadn't opened in thirty days — a simple email saying 'Hey, do you still want these? If not, we'll stop sending.' About twenty percent clicked to stay, and the rest were removed. That cleaned up her list and improved deliverability because fewer emails bounced or went to spam. Luna: It's counterintuitive — shrinking the list to grow the business. But it works. Lucas: Right. And that's the core message: the number that matters most is not the one on the top of your dashboard. It's the health of your existing audience. Now, you can build this dashboard in any email platform — most have basic reporting. But the key is to look at the trends, not the single-send numbers. Luna: And if these marketing conversations have sparked something you've actually used — maybe you've looked at your own newsletter metrics differently — that's exactly what we hope for. We keep these episodes ad-free because we want the advice to stand on its own. If you find value in that, supporting the show is easy: buy me a coffee dot com slash fexingo. One-time, no subscription, no pressure. Lucas: And it genuinely helps us keep doing these deep dives without worrying about ad sponsors. So, back to the dashboard — the other metric I think is underused is revenue per email sent. Not per subscriber, per email. That's a measure of how well you're monetizing each touch. Luna: So total revenue divided by number of emails sent in a period? Lucas: Exactly. For 'Supply Chain Signals,' her revenue per email was about five cents before the changes. After, it went to eight cents. That sixty percent improvement came from better targeting, better conversion, and lower churn. She sent fewer emails to more engaged people and made more money. Luna: That's a powerful number to track because it ties content, audience, and monetization together. If it's flat, you know something's off. Lucas: And the last thing I'd add is that many newsletter writers don't segment their metrics by source. Subscribers from a referral program might behave very differently from those who found you through a guest post. If you only look at aggregate, you might kill a channel that's actually high-quality. Luna: So break it down — open rate by source, click rate by source, churn by source. Lucas: Right. In her case, subscribers from a podcast appearance had double the lifetime value of subscribers from a lead magnet. So she doubled down on podcast appearances and reduced the lead magnet budget. That's a decision you can only make with a dashboard. Luna: So for anyone listening who wants to start today, what's the minimum viable dashboard? Lucas: Three numbers: thirty-day open rate trend, click to conversion ratio, and monthly churn rate. Put them in a spreadsheet or a simple Google Data Studio report. Update them weekly. Look at the direction, not the absolute number. If any of them is moving in the wrong direction for two weeks in a row, dig into why. Luna: And what about a paid newsletter? Does the dashboard change? Lucas: Slightly. For paid, you'd add churn of paid subscribers separately, and you'd track trial to paid conversion rate. But the core is the same: engagement first, growth second. Because a paid subscriber who never opens your emails will churn eventually. Luna: That's the metric that keeps me up at night — not how many people sign up, but how many actually read and stay. Lucas: And that's the shift we need more newsletter writers to make. It's not a vanity game. It's a business. And businesses need dashboards.