https://www.theguardian.com/technology/2022/nov/11/twitter-blue-check-verification-impostor-accounts

Before Elon Musk took over the badge was granted to celebrities and journalists verified by the platform to prevent impersonation

Twitter’s relaunched premium service – which grants blue check verification labels to anyone willing to pay $8 a month – was unavailable on Friday after the social media platform was flooded by a wave of impostor accounts approved by Twitter.