This law stated that any sort of betting or involvement of money as wages or receiving or transmission of funds through any online portal was unlawful and doing so will be a violation of the law, thus illegal in the states.
The end of the boom is generally considered to be October 2006, when the Unlawful Internet Gambling Enforcement Act of 2006 (UIGEA) became law in the United States, and several online poker sites, including the industry leader at the time, Party Poker, left the United States.