After being slapped with a series of patent-infringement lawsuits by IGT, WMS' lawyers repaid the favor with the accusation that IGTmonopolizes new casinos by giving away accounting software in exchange for the casino's promise to buy at least 75% of its games from IGT.
Makers such as WMS, International Game Technology (nyse: IGT - news - people ) and Bally are testing networks that push games and information out to slot machines, allowing a nearly unlimited array of moneymaking choices.