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For example, if more money is being bet on a favorite, the oddsmaker will give a point or two to the underdog to try to entice people to bet on the underdog to even up the action. If there is even money bet on both sides of a bet then the book maker is guaranteed a profit no matter who wins the game because of the 10% juice they collect. This is how sports gambling operates.
They are trying to split the gambling public, not predict the score. It is important to have early and late access to as many betting lines as possible. This will enable you to keep up with, or get a jump on line movement. Sports gambling can be wonderful entertainment, casual curiosity, even professionally profitable. You should also know that, like any form of gambling, sports gambling can get people in a lot of trouble.
Moderation and self-control are the key to avoid becoming one of the 2% of all adults who are helplessly addicted to gambling. The legal age a person can be to place a sports bet in this country is 18. I would think anyone under the age of 18 should not be gambling his or her limited amount of income on any form of gambling.