With all the picks they got for the Harden trade, they have more picks than they will be able to use so why not use one to bring in a player they can try to use this season. This is the kind of thing that a team in Houston's position can do. If they can shine him up to have some value, they flip him in another trade down the road. I doubt he is ever viewed as part of some future core or anything like that. Just a move with the potential to be an incremental asset improvement.