I think Bruno's theory must be very close to the truth.
Spurs want to trade Hill. They send signals that they are to trade Parker (which makes a lot of sense given his current situation--playoffs, mouthing off, extracurricular activities...). The Spurs start to receive some offers for Parker, some of them quite good. In the meanwhile Hill's value goes up. However the Spurs never wanted to trade Parker in the first place, so they add RJ to any Parker deal, knowing nobody will take them up on that offer (and so far, nobody has indeed). Then they let everybody know that since option #1 (trading Parker +RJ) isn't working out, they are open to option #2 (trading Hill), which was actually their option #1 all along, but with which they might manage to gouge some team by pretending they really didn't want to trade Hill.
CIA.