Wong holds back ( like any other author), on sports. Print is too slow. I agree with WB that Wong is much more expert at BJ. He wouldn't publish something like correlated hockey parlays ( long dead). I found nothing blatently wrong in his book, just not up to date. Even in his BJ books, 6:5 BJ payoffs aren't factored in, he couldn't have seen that coming 10 years ago. Best info is current info.
Info with emphasis on old rules becomes archaic, such as before 6:5 BJ, 3-point baskets in hoops, 2-point conversion in NFL. Wong's site encourages you to buy his "Host's" picks. Fezzik sells picks, etc.