Before revision:  These accounts engage in various suspicious behaviors , including some that violate platform policies: we find evidence of  inauthentic automated accounts , artificial inflation of friends and followers, and abnormal content deletion . The networks are also responsible for amplifying toxic content from low-credibility and conspiratorial sources.
After revision:  These accounts engage in various suspicious behaviors , including some that violate platform policies: we find evidence of inauthentic automated accounts , artificial inflation of friends and followers, and abnormal content deletion , as well as amplification of toxic content from low-credibility and conspiratorial sources.