Rising Acquisition Costs
I work closely with clients every month to review performance across their marketing channels, and one topic comes up consistently: paid acquisition has gotten more expensive every year. These aren't just anecdotes from a few clients. Triple Whale tracks ad performance across tens of thousands of ecommerce brands, and from August 2025 to July 2026 the cost to reach a thousand people rose about 13% on both Meta and Google. Every Google category they track paid more, as did 16 of 17 categories on Meta. Cost per acquisition rose alongside it while conversion rates fell, so brands are paying more for clicks that convert less often.
When businesses can't keep raising paid budgets, and new customers cost more while paid placements return less, we look at existing customers as a more efficient source of revenue. That means optimizing owned channels like email marketing. These platforms don't charge per impression or per click, and a brand that owns its subscriber list can message them as often as its unsubscribe rate allows. If you're looking for ways to grow revenue without spending more on paid, here are some strategies we've used with clients to get more return out of email marketing.
Email Costs Almost Nothing Per Send
Your platform bill is usually based on subscriber count and you can message them repeatedly without increasing spend. Some platforms cap sends before you move up a billing tier, but I've almost never seen a brand hit one. Unsubscribes and deliverability problems would show up before you reach the limit.
The cost also doesn't rise when a competitor outbids you. That math changes what you can afford to do. A paid impression served to someone who doesn't convert is money spent, while an email to that same person costs nothing extra. You can keep showing up in their inbox while they decide whether to buy.
Email also has less visibility risk than organic social. We've seen an algorithm change on Instagram or a policy change at Meta cut a brand's organic reach within a week, often with no recourse. Your subscriber list is always reachable as long as you maintain deliverability.
Still, email marketing can’t replace paid acquisition. New customers have to come from somewhere, and digital advertising is how most brands reach them. The argument is about ensuring your owned channels are producing before risking additional budget on a more volatile channel like paid media.
How We Turned Email Marketing Into a Revenue Machine for Alfred Coffee
I've worked on the Alfred Coffee account since our engagement started in 2023. Alfred runs 24 cafes in Los Angeles and an online store selling coffee, matcha, syrups, and subscription products.
Paid media was part of the initial engagement, and we quickly ran into rising acquisition costs. Ecommerce coffee is extremely competitive in paid search and social, with national roasters and direct-to-consumer subscription brands bidding on the same terms. After months of rising costs with little growth, we decided to move the paid media budget into email and SEO.
On the email side, that meant investing in Klaviyo and connecting it to their Shopify store, their Recharge subscription platform, and Toast, the point-of-sale system in all their cafes. We then built automations for each of those integrations. Welcome, abandoned cart, browse abandonment, winback, and replenishment flows now produce 33% of Alfred's email-attributed revenue.
Three years in, Alfred's ecommerce sales are up 40%, active beverage ingredient subscribers have grown 50%, and email-attributed revenue is up 23% year over year. That growth came from an audience Alfred already had, on less paid acquisition spend than when we started.
Understanding and Reaching Your Subscribers
Email platforms already tell you a lot about your customers, and they keep getting better at it.
Mailchimp's bot filtering separates automated opens and clicks from real ones. This is a welcome change since inflated engagement numbers led to bad segmentation and sending more email to people who were never reading it. Klaviyo's Personalized Send Time works on the same principle, using each recipient's own open history to pick a send time for them.
Klaviyo's Social Auto-replies, generally available since June 2026, turns Instagram comments and DMs into email, SMS, or WhatsApp subscribers. Someone comments a keyword, Klaviyo replies in a DM asking for their address, and they subscribe without leaving Instagram. On the sales side, HubSpot sequences unenroll a contact automatically when they reply or book a meeting, and you can extend that to everyone at the same company so a rep isn't emailing four people at an account after one of them already responded.
Every Channel Has its Limits
Digital marketing channels work like a natural ecosystem, where each one feeds the others and the neglect of one channel will starve the others. Email lists decay. Subscribers change addresses, lose interest, and stop opening. Consumer lists commonly lose 20% to 25% of their addresses in a year. Some of the most sophisticated email marketing programs I've worked with have stopped performing because the brand's new customer acquisition efforts had stalled. Subscribers have to come from paid acquisition, SEO, or social. Cutting acquisition to fund email would shrink the audience the program depends on.
Sending more campaigns has limits too. Too many extra sends to the same list can drive up unsubscribes and create deliverability issues. Poor deliverability is especially difficult to recover from. It's often smarter to invest in better segmentation, automation tuning, and impactful campaign planning than to send more emails.
The case for email is also weaker for brands with small lists or long purchase cycles. Alfred sells a consumable product that their customers buy repeatedly, which is close to the best possible setup for email. A brand selling one expensive item every few years relies far more on acquiring new customers.
How to Decide When to Invest in Owned Channels
If your brand is working with a fixed or shrinking acquisition budget, you often can’t buy more leads without accepting a worse cost per acquisition than you paid last year. This is when you should look at generating more revenue from existing customers.
- Invest in tools that make your existing customers' lives easier. Loyalty programs, subscriptions, wishlists, and other customer experience programs can increase your margins with your owned channels.
- Optimize your core automations (welcome series, abandoned cart, customer winback) and add timely touches like a replenishment reminder or back-in-stock email.
- Revisit your segmentation strategy. Try communicating more with your most engaged audience members while winning back lapsed customers with great offers.
- Test, adjust, and test again. Your subscriber list gives you immediate feedback when you try something out, and subscribers are more likely to stick around while you home in on a winning strategy. Testing offers with email can be a great way to see what sticks before using them on paid campaigns.
These strategies work when your acquisition channels are well funded and running smoothly as well. Regardless of where you are going into budget planning, it's important not to forget about your existing customers. Take the time to ensure you're using owned channels like email to meet them where they're at and anticipate their needs. Do this, and it's easier to absorb increases in acquisition costs.
If you need help getting the most out of your digital marketing channels, the ecommerce experts at Graybox offer free consultations before any engagement. Get in touch.