You really just win 1.05 per every 1. But you'd get your 1 credit back added to that so that's where you probably got the 2.05 I think. Same odds they have up at bookmaker.eu for real money... safer here you might say!
Haha.. I have a bet on at the moment that will win me 4.8 million dollars if it all goes as planned. In Australian betting if they were the odds for JDS then you would be losing 30cents per dollar you bet.