They make the team THEY think are the better team FAVORED.
It is all what THEY THINK.
THEY ARE THE EXPERTS and they don't care about balancing the action with a line that attracts money on both sides. Just bet the team THEY think is better...ok.
If you bet the better team every time, you will win. For example...
The Seagulls are favored over the St. Louis Rams by 6. So...that means I should bet the Seagulls -6.
Ok, time to win money...thanks for reading this.