Personally I think that salary impact of rebound doesn't worth it
As for this part, I am not sure, either. For sure it has an impact that is not negligible. And usually the argument I see for this is you do not see a big difference in the guard's rebounding stats even if he wins the rebounding battle.
But what if - the effect of winning the rebounding battle gives you more than what the guard's stats say? What if it also has a trickle down effect on all your other players... In fact, this is my personal speculation on how they implemented "boxing out".
I don't know, maybe even with that, it is still not enough to justify the salary.
Run of the Mill Canadian Manager