Thats just another doubt I have. Its easy to have tennis /Golf/Billiard games rigged, but its not easy in terms of Basketball, as the ethics of the entire team might not align to have it fixes.
The NBA is the easiest sports to fake. The teams play every day, again it is not that the team will win or lose but the point spread, basically a favorite team may leave the underdog team covering the point spread while winning the game.