How Come There Has Never Been A Bound For Glory Pay Per View In Madison Square Garden ?

Isn't Bound For Glory supposed to be TNA 's version of Wrestlemania ? Is Dixie Carter afraid over the fact that TNA does not have a large enough fanbase to sell out an arena like Madison Square Garden. If so, that just proves that TNA is nowhere near the WWE's league and they have a long way to go when it comes to being serious competition for the WWE.