Ads for several prominent Canadian companies and organizations have been appearing in the feeds of extremist accounts on X, prompting some of them to pause advertising on the social media platform following an investigation by CBC News. They join a growing number of brands that are backing away from X, formerly known as Twitter, amid the unchecked rise in hateful content and owner Elon Musk's seeming endorsement of antisemitic and other far-right conspiracy theories. A review by CBC News of about two dozen accounts linked to white nationalists, white supremacists, misogynists and other extremists found ads by major brands such...