It is a interesting phenomena and will probably always be a factor as long as there are cities willing to pay the ransom to get a team. I think it will be harder and harder for cities to pay up because at some point, maybe now even, the people are going to revolt over spending that much taxpayer money (I'm there now) for something as unnecessary as a NFL team. And at some point I think the Pegula's of the world will start passing as well. But as long as there is some entity willing to pay, teams will jump.