A boycott of links to Mr. Musk’s social media platform spread on Reddit this week, after he made a gesture that some likened to a Nazi salute. Others worried about censorship.

Many Reddit users are boycotting the social media site X, formerly known as Twitter, after Elon Musk twice made a gesture during President Trump’s inaugural celebration that drew comparisons to the Nazi salute.

Mr. Musk, the billionaire owner of the social media platform, was speaking at a celebratory rally after Mr. Trump’s installment as the 47th president on Monday when he grunted, placed his hand over his heart and lifted his arm with the palm facing down in a hail to the audience.