Hey, I just said that is an example I hear frequently. I didn’t make it up, or I say whether or not I agreed. 
Although rappers may “choose” their own managers, some people imply that they are manipulated or indirectly forced to. Perhaps that is the case Farrakhan wants to make, IDK.
Here’s an article from the NOI’s newspaper on the topic: http://www.finalcall.com/artman/publish/Entertainment_News_5/article_8500.shtml