re: Sports betting hack or trick?

I remember reading about one where you bet on all #1 seeds to advance to the sweet 16 and then hedge by betting the underdog in each 1 v. 8/9 matchup. It was a way to tweak the odds on the fact that a 1 seed had never lost to a 16 seed (this was pre UVA) plus the added boost that 8/9 seeds had a good record ATS on their weekend games vs the 1 seed.