This is just like Under Armor and cutting ties with the Bomars after the spear incident. UA wasn't wanting to renew their contract, probably because they wanted to give more money to Eva and Tiffany (righty so I think.) They were looking for an easy out and that was it. Nothing more.
Dick's was probably looking to cut these ties because of low sales anyway and they thought this was a good PR move and killed a few birds with 1 stone kind of thing.
Another example. Talladega Race Track-- remember when a person could carry in as much beer as they could tote? Then after 9/11 it was reduced to a 6 pack cooler. Why do you think that happened? Was it for the safety of the crowd or because now the track would sell 10X more beer in the concession stand at $6 a beer? It was an excuse to stop the big coolers.