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PPI vs CPA, CPC, and CPM: Comparing Monetization Models

A traffic owner has four mainstream monetization models: CPM (pay per impression), CPC (pay per click), CPA (pay per action), and PPI (pay per install). Here's how they differ in practice and when PPI wins.

Each Model in Brief

  • CPM — pay per thousand ad impressions. Revenue is predictable but minimal: dollars or cents per thousand views. Traffic must be enormous to matter.
  • CPC — pay per ad click. Higher than CPM but still cents; click-through depends heavily on niche and format.
  • CPA — pay per action: a purchase, a deposit, a confirmed registration. Rates are high, but the funnel is long: the user must pay or complete a form, and the audience drops off at every step.
  • PPI — pay per software install. A single action, free for the user, and a familiar one: download and run the installer.

Why the PPI Funnel Converts Better

The key difference is funnel length. In CPA, the user often needs to pull out a bank card or complete a multi-step registration. In PPI, downloading and installing a program is enough — an action a software portal visitor already intended to take. That's why on download traffic the install conversion is usually several times higher than the purchase conversion, and the total revenue per thousand visitors ends up higher even with a lower per-conversion rate.

Revenue Comparison on the Same Traffic

Take a hypothetical software portal with 10,000 monthly visitors:

  • CPM banners: about $0.10–$0.50 per thousand impressions — $1–5 per month.
  • CPC: 0.5–1% CTR at $0.05–$0.20 per click — $2.5–$20 per month.
  • CPA: cold-traffic purchase conversion is a fraction of a percent; revenue is unstable.
  • PPI: 300–600 installs at an average rate of $0.50–$0.70 — $150–$400 per month.

The gap is this wide precisely on a downloading audience: it already has the intent to install software.

When PPI Is Not the Best Choice

  • Media traffic without download intent (news sites, entertainment content) — CPM is steadier there.
  • Audiences ready to pay (financial product reviews, B2B) — high-ticket CPA can earn more.
  • Mobile organic traffic — app store economics have their own CPI networks.

For desktop download traffic — software portals, catalogs, file-sharing resources, setup guides — PPI consistently shows the best revenue per visitor.

How to Try It

Minimal test: one offer on download pages for two weeks. Measure installs and revenue, compare with your current model. Registration is free, and per-GEO rates are visible in the dashboard. Before starting, read the service rules — they describe allowed traffic sources.

Further reading: what Pay-Per-Install is and per-GEO install rates.