Russia reportedly paid $45,000 for Michael Flynn's 2015 talk "Some Democrats allege that Flynn's trip appeared to run afoul of rules barring former military officers from accepting consulting fees, gifts or travel expenses from a foreign government, Yahoo said. It also raises questions about what Trump knew about Flynn's Russian connections before hiring him."
There was talk of a growing dissatisfaction with Flynn before he bowed out. My take is that they were discovering things he hadn't revealed.
I don't believe that there's anything wrong with being paid to do something, even if it's the Russians. The problem comes with not being forthcoming with this information. Like not telling anyone he was working for Turkey while he was receiving national security briefings https://www.nytimes.com/2017/03/10/us/politics/michael-flynn-turkey.html?_r=0
Well, a lot of people seemed to think Hillary's Wall Street speeches are somehow suspect... Speaking at a RT lie factory korporativ is exponentially worse. Plus the spectacle of being paraded as Putin's pet American general. Steven Seagal, Depardeau, and Flynn. Also, I'm extremely interested whether or not Manafort had anything to do with a protester massacre in Kyiv in 2014. I. e. if he was involved in decision making process that led to mass murder steps from a place where I worked back in 2002. I actually doubt it, but it highlights who he was working for at a time. Just one of the snakes Trump campaign seemed to rely on.
More Manafort news: Former Trump campaign chief Paul Manafort wanted for questioning in Ukraine corruption case - CNNPolitics.com