Why the Lakers do this: Lakers still badly need shooting and scoring. This move give them that, and also bolsters their bench (Rui or Cam would come off the bench, probably Rui). I am not very high on Vanderbilt as he is almost a non-factor on offense, and losing Vincent is not that bad as Lakers already have 3 ball handlers/playmakers (D'lo, Reaves, Lebron). Cam can still be a very good defender on a competitve team, and he is only 28 meaning he will still have value if Lakers want to flip him in 2-3 years. I think this is a no-brainer for the Lakers. Lakers will have a much more formidable bench with Rui, Christie, and Kinecht.

Why the Kings do this: Vanderbilt would be a good piece off the bench for defensive purposes. He would be good in the playoffs for guarding bigger guards/forwards such as: Shai, Luka, KD, Lebron, Randle, etc. That 1st is not too valuable as Kings are going for it all.

Why the Nets do this: Nets are rebuilding, simple as that. 2 1sts and a 2nd with potential to flip Vincent for some 2nds is a pretty good deal for Cam, who will not be there by the end of the year most likely.