With 50 million claimed users, Adblock may have temporarily become one of the world’s biggest ad publishers on Saturday.

Typically, Adblock’s browser extension replaces digital display ads with nothing more than empty white space. But to honour the “World Day Against Cyber Censorship” on March 12, it instead replaced them with ads for Amnesty International featuring photos and quotes of some of the most prominent recent victims of censorship, like artist Ai Weiwei, whistle-blower Edward Snowden and activist group Pussy Riot, and linking to content featuring them telling their stories and explaining why the fight against censorship is an important one.

Some users were a bit concerned about Adblock being used to deliver ads to users who signed up to have them blocked (though we’re guessing those concerns fell on deaf ears when it came to the marketers and publishers of the world), but in a blog post, Adblock’s CEO explained why censorship was a cause it felt strongly enough to bring the walls down on (though we’re also guessing his inbox is probably full of requests to make it more than a one-time thing, especially now that the people who spent the last year thinking of ways to beat adblockers have seen a crack in the armour).

Credits:

Brand: Amnesty International