<p>Elon Musk says that activist groups pressuring Twitter advertisers have cause the social media giant to see a "massive drop in revenue."</p> <div class="ad-container desktop ad-h-50 ad-w-300"></div> <p>"Twitter has had a massive drop in revenue, due to activist groups pressuring advertisers, even though nothing has changed with content moderation and we did everything we could to appease the activists," Musk tweeted on Friday. "Extremely messed up! They're trying to destroy free speech in America."</p> <p>A group of more than 40 organizations, including the NAACP and GLAAD, have sent an open letter calling on Twitter's top 20 largest advertisers to cease advertising on the platform if Musk rolls back its current content-moderation practices.&nbsp;</p> <p>The letter argues that within 24 hours of Musk taking ownership of Twitter, the platform was "inundated with hate and disinformation."</p>