A browser extension used by millions to strip advertisements from websites has built a business model that charges some of the internet’s biggest companies for the privilege of having their ads exempted from its blocking list — while letting the vast majority through at no cost.
Adblock Plus, made by German company Eyeo, operates what it calls an Acceptable Ads list: a register of advertisements deemed unobtrusive enough to be allowed through its filter. Any company or publisher can apply to be included, but those operating at scale — large advertising networks and major publishers — are charged a fee for the work involved in processing and maintaining their whitelist status. Around ten percent of businesses on the list pay. The other ninety percent are handled without charge.
The extension did not begin this way. It started as a hobbyist project with a straightforward aim: blocking every advertisement on the web, without exception. As it grew, its founders began to worry that a total blockade would undermine the advertising-funded model that much of the free internet depends on. An early attempt to prompt loyal users of specific websites to voluntarily whitelist those sites proved unpopular. The Acceptable Ads approach followed in 2011.
Criteria for what qualifies as acceptable are determined with input from the Adblock Plus community forum and the wider EasyList forum, which also supplies blocking lists to other ad blocking tools. Eyeo has since announced plans to hand decision-making on the list to an independent board drawn from publishers, marketers and media organisations.
The arrangement has attracted persistent criticism. Publishers and media companies have argued in German courts on four separate occasions that Eyeo should not be permitted to block advertisements on their sites or operate the paid whitelist system. Adblock Plus has won each case.
The company has also faced accusations of operating something closer to a protection racket — charging companies for the ability to reach audiences who have specifically chosen to avoid advertising. Eyeo rejects that framing, pointing out that the blocking criteria are set by an open-source community rather than by the company itself, and noting that the majority of whitelist work is carried out without any fee changing hands.
The Acceptable Ads list has been adopted by other ad blockers beyond Adblock Plus itself, extending its reach and the number of companies subject to its standards. Eyeo frames its overall mission as pushing the advertising industry toward less invasive formats rather than eliminating online advertising altogether.
