He's more scorer than shooter and they don't need another undersized guard, that is sub par defensively and can't run an offense.
If he were to be bought out, he'd be signed for a prorated portion of the veteran's minimum though, so it wouldn't be an issue financially.
Yeah, if Ginobili unexpectedly returns and one of Anderson or Simmons establish themselves as rotation players, then they can take a chance on someone unestablished.
Two more names to add to the "post trade deadline candidates", are M. Williams and Novak.