After being sued for impersonation, Twitter adopted a blue and white check mark in 2009. The option was touted as security for users at risk of having their accounts fraudulently copied. Musk is updating Twitter Blue to let users to pay $8 per month. Advertisement After being sued by then-St. Louis Cardinals manager Tony La Russa for impersonation, Twitter adopted a blue and white check mark in 2009. Twitter verified artists, athletes, government leaders and agencies, and other public individuals. The option, which began with intentions to verify the Centers for Disease Control and Prevention, was touted as security for…