Spend Into a Positive LTV:CAC
If a dollar of ad spend returns more than a dollar, spend every dollar you can find.
- Difficulty
- Moderate
- Time to result
- ~months to results
- Steps
- 4
- Confidence
- 83%
Once you know a subscriber's value, the Morning Brew mentality is to spend uncapped as long as the return is positive: if $1 of ad spend turns into $1.10, spend every dollar you have. Austin and Alex tracked daily cash flow to fund it, at peak spending $500k+ a month and growing 20,000-25,000 subscribers a day via MacBook giveaways — their only regret was not finding even more money to put into Facebook ads. Sam names the counter-mistake he made: capping spend at ~$80k/month regardless of return because a bigger number felt astronomical. He calls that an immature, scarcity-driven mindset. The rule decouples spend from your emotional comfort and ties it to the math.
Origin
Austin Rief and Alex Lieberman, with finance backgrounds, applied a return-driven spend rule at Morning Brew; Sam Parr contrasts it with his own scarcity-capped spend at The Hustle.
Core principles
- 01Tie spend to return, not to a comfort number.
- 02Positive LTV:CAC means spend as much as you can fund.
- 03Track daily cash flow to sustain aggressive spend.
- 04Scarcity mindset around spend is an immature constraint.
How to run it
- 1
Validate the return
Establish with data that a dollar of acquisition spend returns more than a dollar in subscriber value.
- 2
Drop the arbitrary cap
Stop limiting spend to a number that merely feels comfortable; the constraint should be the return and your cash, not your nerves.
- 3
Fund it with daily cash-flow tracking
Monitor cash daily so you can push spend to the edge of what the business can fund.
Pro tip Morning Brew grew 20-25k subscribers in a single day via MacBook giveaways by spending everything it could find.
- 4
Scale while the math holds
Keep increasing spend as long as LTV:CAC stays positive, watching retention so the ratio doesn't quietly invert.
In the wild
By the end of 2018 Morning Brew was spending at least $500k a month on ads and growing tens of thousands of subscribers a day; their only regret was not finding even more capital to deploy.
→ Aggressive spend against positive returns compounded the subscriber base fast.
Sam capped The Hustle's ad spend at ~$80k/month regardless of the return because a bigger number felt astronomical, later calling it a failure and an immature, scarcity-driven mindset.
→ Under-spending against a positive return left growth on the table.
Common mistakes
Capping spend by feel
Limiting ad spend to a number that feels safe, rather than to the return, leaves growth on the table when the economics are positive.
Spending before LTV is known
The rule only holds once you've proven the return; spending uncapped on unvalidated economics burns cash.
Is it for you?
Best for
Founders who've proven their unit economics and are deciding how aggressively to fund growth.
Not ideal for
Businesses that haven't validated LTV, or where cash-flow risk from aggressive spend is existential.
From the transcript
“You had this mentality of like, well, if $1 turns into $1.10, I will spend every $1 I have.”
“We spent every dollar we could possibly find and my only regret is we couldn't figure out a way to find more money to put…”
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