Defjam invests in the artist, Roc Nation is supposed to get and negotiate deals for the artist. This is why an artist can fire the management. Again, Rihanna is not obligated to RN.

Lady Gaga just fired her manager, what you're saying is all theory but the facts still remain; an artist doesn't owe a manager anything besides the 20% they get on negotiated deals.

Hence Roc investing in Rita Ora (her label) but not Rihanna; that's DefJams job. That's why the CEO of DefJam flew with Rihanna on the 777 tour.

Facts > your opinion.