https://www.vice.com/en_us/article/a35nbj/twitter-content-moderation

In leaked audio published by The Verge last week, Facebook CEO Mark Zuckerberg said Twitter can't do as good a job at policing its network as his own company.

"I mean, they face, qualitatively, the same types of issues. But they can't put in the investment. Our investment on safety is bigger than the whole revenue of their company," Zuckerberg said in a July Facebook meeting.