In response to the revelations, Musk hit WFA, GARM and a handful of key advertisers with a federal antitrust lawsuit for allegedly organizing an ad boycott.
The boycott cost X “billions of dollars in advertising revenue,” according to the suit.
WFA and GARM have strenuously denied wrongdoing. However, GARM shut down in August, citing mounting legal costs of its fight against Musk.
In October, X announced that it had reached a settlement with one of the defendants, Unilever, which had plans for its brands to resume advertising on the platform.
The antitrust claims against the other defendants are still pending.