MC thought that preventing money from going to some people who move information around was a smart business decision. Anonymous replied with, <<No, trying to prevent the free flow of information is a bad business decision.>>
They do this, presumably, with the idea that next time MC will think twice before doing their part in silencing the flow of information.
This is all irrelevant to WikiLeaks. They have nothing to do with this at all, except that their particular case provides Anon with a clear example to set for MC.