Washington (Reuters) -- Online gambling operator BETonSPORTS plc. pleaded guilty to U.S. racketeering charges and agreed to cooperate in a case against the company's founder and other co-defendants, federal prosecutors said on Thursday. BETonSPORTS admitted to a "pattern of racketeering acts," including mail and wire fraud, operating an illegal gambling business and money laundering, U.S. Attorney Catherine Hanaway said in a statement.