The twitter report says:
"Based on our findings thus far, RT spent $274,100 in U.S. ads in 2016. In that year, the @RT_com, @RT_America, and @ActualidadRT accounts promoted 1,823 Tweets that definitely or potentially targeted the U.S. market. These campaigns were directed at followers of mainstream media and primarily promoted RT Tweets regarding news stories."
Which doesn't seem particularly nefarious to me. Does RT have a political bend to their organization? Probably. What state funded news organization doesn't? It's 270k on stuff that "definitely or potentially" targeted Americans? What does potentially mean and what is the breakdown? What % actually had to do with the election?
Also if I have the timeline correct Twitter bans RT from advertising two hours after they publish their side of the events?