Mark Cuban has publicly questioned the effectiveness of ads on Twitter, now known as social media platform X, following Elon Musk's acquisition and subsequent changes. Cuban's critique comes amidst advertisers withdrawing from the platform due to concerns over ad efficacy and content association. He compared the ad results unfavorably to those on other platforms, specifically mentioning Meta Platforms' Facebook and Instagram, where ads are more relevant to user interests. Cuban's comments highlight the challenges Musk faces in retaining and attracting advertisers to Twitter.