Not always...when 70% of the money is on the winning team, they lose money
UMMMM......it's very, very, very rare that 70% gets put on one side!! The whole POINT of the point spread is to get money evenly matched on both sides, where Vegas (or bookie) gets half the money PLUS the juice!! Folks need to remember that just because the point spread is, lets just say Bama -1, that doesn't mean Vegas believes Bama is the better team. They don't care who the better team is.....they want equal money bet on both sides no matter what. That IS the reason that the point spread moves. If too much money gets bet on one side, the spread moves so they will entice folks to bet the other way.
Anyway, Vegas doesn't lose money very often!! I mean, all the odds are in their favor!!