Both of those spring-and-early-summer minor leagues exist purely because television needs some sort of team sports programming other than baseball during the months in which the other sports are either in their off-seasons or in their playoffs (which negatively impacts ratings/revenue in cities whose teams aren't in the playoffs). Neither league is playing all of its games in their franchises' home cities, resulting in "studio football" with few people in the stands, showing little enthusiasm.
Maybe some of these teams, in cities that don't have NFL football, will eventually develop strong fan bases of their own. That's why you're seeing games played in Birmingham and Memphis and, oddly, Canton, Ohio. But really, does the USFL really think that actually putting the New Jersey Generals in the NYC area rather than Canton or the New Orleans Breakers in New Orleans rather than Birmingham would be a good idea?
Is the NFL playing 12 months a year? No. But in fan interest, even in the off-season, it's as close to a year-round sport as we have.
Maybe some of these teams, in cities that don't have NFL football, will eventually develop strong fan bases of their own. That's why you're seeing games played in Birmingham and Memphis and, oddly, Canton, Ohio. But really, does the USFL really think that actually putting the New Jersey Generals in the NYC area rather than Canton or the New Orleans Breakers in New Orleans rather than Birmingham would be a good idea?
Is the NFL playing 12 months a year? No. But in fan interest, even in the off-season, it's as close to a year-round sport as we have.