Soccer (futbol) refereeing is far more sketchy than football. In addition to the normal complaints about incompetence that all sports fans have about referees, you have the added corruption. People bitch about the refereeing the in Super Bowl, and justifiably so, but no one seriously thinks the refs are trying to give the game to a particular team (at least no one rational). Moreover, you have fans so rabid (and devoid of sense) that they make Raider Fan look like your average girl scout.
I know the indoor team in Wichita did okay attendance wise and with some success drew decent a playoff crowd. But I haven't a clue how solvent they are. With what they pay the players, it shouldn't take much to make a profit.