Channels Have Economics
Why does the channel that converts best often fail to grow the business?
The idea
Every acquisition channel has different cost, intent, and scalability.
In the real world
Referrals convert well but may be difficult to predict.
Going deeper
Conversion rate measures intent, not opportunity. Referrals convert well because they arrive pre-trusted, and that same mechanism caps how many you can generate, since you do not control who recommends you.
A channel therefore has at least four properties: cost per acquisition, conversion rate, ceiling, and how much of it you control. A channel with a poor rate that you can turn up on demand may be worth more than an excellent one you cannot influence — particularly when you need growth on a schedule. Judging channels on conversion alone reliably kills the ones that were providing the volume.
Where it stops applying
Channel economics shift as you scale: the cheapest ones usually saturate first and cost rises with volume. A comparison taken at today's spend does not hold at five times the spend.
Why it matters
It stops you judging channels on conversion rate alone, when cost, intent and ceiling matter just as much.
Try this today
Compare two channels on cost and buyer intent.
Test yourself
Referrals convert at 40% and paid search at 2%. The team proposes shutting down paid search. What does the conversion rate not tell them?
Show the answer
Whether referrals can be increased on demand. High conversion comes with high intent and a volume ceiling you do not control; a channel you can turn up may be worth keeping at a worse rate.
Learn this in the feed Answering from memory, then again days later, is what makes it stick.