There is a machine that randomly selects 20 balls from the 80 that are present, and you preselect the 20 numbers you wish and mark them on your Keno is also play with Keno cards or tickets, and the individual numbers from 1 to 80 are displayed on.
So, to begin it is dependent the gambling law that a particular country has especially in managing an taxes from online casinos. While all winnings are automatically taxed through government.