Likely a contractual obligation entered into before the divestiture that had to be honored. I doubt it will last beyond the recently held Olympics.
There are always reasons, if one gives it a couple of minutes of consideration instead of just posting without thinking it out. I know everyone's mind doesn't work as quickly as mine -- and sometimes even my mind fails me at providing a quick answer, so I am fully aware of how different everyone's thought process is -- but when one does approach anything like this from a "why did that happen?" POV, oftentimes the answer will become obvious.
It took me much longer to write this than it did to come up with the most logical answer.