How Digital Advertising Alliance's AdChoices tool, which launched in 2010 to let users opt out of personalized ads, is undermined by its cookie-based approach (Aaron Sankin/The Markup)

Aaron Sankin / The Markup: How Digital Advertising Alliance’s AdChoices tool, which launched in 2010 to let users opt out of personalized ads, is undermined…

View More How Digital Advertising Alliance's AdChoices tool, which launched in 2010 to let users opt out of personalized ads, is undermined by its cookie-based approach (Aaron Sankin/The Markup)