William Shatner and Elon Musk clashed on Twitter over the weekend regarding Twitter's plan to remove blue checkmarks from accounts of celebrities and other high-profile individuals who do not pay for Twitter's subscription service, Twitter Blue. Musk argued that the subscription service is meant to provide additional features to users, while Shatner expressed frustration with the idea of having to pay to keep his blue checkmark. A spokesperson for Twitter declined to comment on the dispute, leaving the future of the plan uncertain.