For those that already have the CD software, all you have to do is activate it at their site. Also has a free play for fun. This game is very nicely set up. You get 50 credit a week to try and get the most points accumulated. There are also other chances to earn credits as well.
High scores have a chance at winning a monthly prize or a yearly Grand Prize.
Players can also redeem their points for Participation Rewards, which can later be turned into cash. Interbet holds bingo tournaments and a lot of other tournaments often to win cash at. You will have to download Interbets software to play. Give it a try. Loads of fun.