So, Ely's contract is a 2 year deal, with the second year being an unguaranteed 1.45 million dollars. The Pelicans could use that as a trade chip, with the other team trading for it and then just cutting Ely with no penalty. It is a sneaky way to make trades work by adding salary to fulfill CBA rules.
If you think Dell just randomly did this, then you don't know Dell by now.
Random example - Swapping Gordon for Amare wouldnt have been legal this summer. Now, add Ely and it is a legal trade without the Knicks really having to add any salary because they can just cut Ely.
Just throwing a random trade out there, but you get the point.