Us online gambling
Naturally, because commercial casinos cause businesses to mushroom around them, they create jobs for hundreds of thousands of Americans. Having a job means having the power to earn and spend money, which in turn leads to the growth of other industries totally unrelated to gambling.
Gambling also means more revenue in the form of taxes for the state and federal governments. The government could always use more tax money to fund such endeavors as raising the quality of education throughout the country, socialized housing and health care, or even the war against terrorism.