Mayweather isnt really tired on making these exhibition fights? Fighting with a Rapper? What in the world is happening?

50 cent had some history of boxing in the past as an amateur when he's still a teenager. Seriously?
There is money to be made in doing an exhibition, he goes where the money is, and besides, he is safe from getting hurt Curtis Jackson (50 Cent) do not have a knock out punch, compared to Manny he is likely to get hurt and can make fun and exploit Curtis Jackson's (50 Cent) inexperience as a boxer, he is a real business minded guy and do not want to take chances with his record so instead of accepting Pacquiao's offer he chooses to be on a safe side.