1) Because he seems to be a decent offensive player, can rebound will from what I have seen and being the third string PF on the Magic may be attainable.
2) He invented snoggle - http://allball.blogs.nba.com/2010/11/22/ryan-anderson-master-time-waster/
3) Can you imagine this with JMZ and Nash? He would easily fit in.
While the second reason may not be that good, at least the first reason has some logic behind it. Its mostly just there so you can appreciate that before you appreciate snoggle