I think he's talking about TV rights? I dont live in Austin so i dont know if Spurs games are carried locally (or if people have to buy league pass). If not, I wonder if part of the play here is to get local rights in Austin, which would probably help grow the fanbase more than moving the stadium ever would (at least in the short run).
As an example, I live on the Maryland side of DC. Even though its about equidistant for me to go to Baltimore to see the Ravens as it is to see the Redskins/Commanders games, NFL blacks out the former in my region from the local feeds (and viceversa), and I think baseball is the same between Natz and Os (dont know for certain bc i dont watch baseball on TV). Meanwhile on the Virginia side of DC, I think Redskins and Natz are local at least all the way down tot Richmond. Those guys are hardcore skins fans.