“Hundreds of people have been arrested in a worldwide operation over a South Korea-based dark web child sexual abuse site that sold videos for digital cash. Officials from the United States, Britain and South Korea described the network as one of the largest operations they had encountered to date. Called Welcome To Video, the website relied on the bitcoin cryptocurrency to sell access to 250,000 videos depicting child sexual abuse, authorities said, including footage of extreme abuse of young children. Its upload page specifically stated, “Do not upload adult porn”.”

Source : Police arrest hundreds over international child sexual abuse website | Technology | The Guardian