Five former Twitter employees have been forced to drop a class-action lawsuit against Elon Musk’s company due to previously signing arbitration agreements. The claims of several employees who did not sign the agreement will continue, and the lawyer representing employees vows a wave of arbitration cases against Musk’s company, explaining, “Mass arbitrations are incredibly costly for companies to defend and many employers have found themselves sorry about what they wished for when they insisted that employees would have to pursue their claims one by one.”