And finally, regarding numbers of games and significance.

While it's true that "anyone can get lucky for 120 games," the fact is that you are not dealing with coin flips. These are games of opinion. Strictly speaking mathematically, basic rules of probability do not necessarily apply. For example, if that NBA official who was snagged betting on games happened to go on a 20-2 ATS run, would it really be appropriate to say, "anyone can get lucky?" One can also see a particular culture valuing some elements of results more than another, so that lines can be skewed depending on the culture in which one operates, since lines are not designed to accurately reflect team abilities but are designed to balance wagering in a particular culture.