Nobody forced him to do MM. The point of it was to bring it back to the old feel, where you battle and winner takes all. Everybody getting paid defeats the purpose of the essence of what it is. It's supposed to be like street corner battles/fight klub where you write your best raps, and you might win/you might lose. That's the risk you take.
The people involved knew beforehand it was gonna be released and they weren't monetizing off it.