What is eCPM? (and what crypto inventory actually earns)

eCPM is effective revenue per thousand impressions after everything nets out, regardless of how the ads were sold. It is the publisher’s universal comparison metric: one number that lets you compare a rev-share deal, a direct sale, and a network fill on the same scale.

The formula

eCPM equals total revenue divided by total impressions, multiplied by 1,000. Earn $400 across 200,000 impressions and your eCPM is $2. It does not care whether those impressions were sold at a fixed CPM, on a revenue share, or left unfilled. Everything collapses into one per-thousand figure you can compare across sources.

Why eCPM differs from a quoted CPM

A quoted CPM is the price of a thousand impressions when they sell. eCPM is what you actually earned across every impression served, including the ones that did not sell. Fill rate pulls the two apart: unsold inventory earns nothing but still counts in the denominator, so a high quoted CPM with poor fill can produce a low eCPM. Rev-share components move it too, because your take depends on campaign performance rather than a fixed rate. eCPM is the number that survives all of that.

What moves eCPM for crypto publishers

Three things push a crypto publisher’s eCPM up:

1. Audience provability. Advertisers pay more when they can verify they reached real onchain users, so provable wallet-verified inventory earns more than generic traffic.
2. Conversion participation. When your inventory drives outcomes advertisers can measure, rev-share tiers reward it, and your eCPM climbs with the value you help create.
3. Fill structure. Unsold impressions earn nothing under a quoted CPM, which is why floors matter: a network that pays a base on every impression served protects the average without resorting to junk fill, which props up eCPM this quarter while it erodes the audience that earns premium rates next quarter.

A concrete example

Specify’s structure shows how the pieces stack. It pays a $10 CPM guaranteed floor on every impression served, then a tiered revenue share on top. At the top tier that combination reaches $80+ eCPM, and conversion rates of 0.7% are not rare on wallet-verified inventory. The floor sets the bottom of the range; conversion participation sets the top. You can model your own numbers with the revenue calculator, and the mechanics of monetizing a crypto website and picking a crypto ad network go deeper on both sides of the deal.

Quick answers

Is a higher eCPM always the better deal? Usually, but check fill. An eCPM that only holds on a slice of premium inventory is worth less than a slightly lower eCPM that applies to everything you serve.

Why do two networks quote the same CPM but pay different eCPMs? Because fill rate and rev-share terms differ. The quoted CPM is a price; the eCPM is what actually lands after unfilled impressions and performance-based share are counted.

What eCPM can a crypto publisher realistically expect? It depends on audience and fill, but Specify’s $10 floor sets the bottom and top-tier inventory reaches $80+. Book a publisher call to run your own numbers.