Elon Musk reacted to a meme about Mark Zuckerberg-led Meta's new social media platform 'Threads' being Twitter's "copy" with a laughing emoji. Threads allows users to post text up to 500 characters and has many features similar to Twitter. Earlier, Musk had tweeted, "I'm sure Earth can't wait to be exclusively under Zuck's (Zuckerberg) thumb with no other options."