Major findings show that the online visibility of offshore sites may be a key predictor of the use of the sites by U.S. Using routine activities theory, this study attempted to understand environmental and theoretical factors that affect the use of offshore sites by focusing on offshore gambling-generating contexts that involve offshore sites and online casino reviews. Although numerous law violations occur in this domain, prior research has reported limited information about offshore gambling, mostly focusing on offshore gamblers’ characteristics and motivations. Despite the recent proliferation of legal online gambling in the Unites States, offshore gambling sites still remain prevalent, causing various problems in the U.S.