Not necessarily. Green Bay is still smaller than the remaining population of the NO metro area, and sells out every home game. The Saints season ticket base is not limited to just NOLA, but encompasses an area from Lafayette in the west to Mobile in the east, and much of Mississippi. If they know that Benson's out of the picture, and the Saints are staying, they'll keep buying those tickets.
True, but Green Bay is a bit of a phenomenon in itself. Publicly owned... and a fanatic public at that.