It appears to allow you to have a ‘fun’ account to play with, but also the option to create a "real money account" which is frightening.
The sceptic in my thinks that once the downloadable software is installed, set up and played, it is designed to, how shall we say, allow you to win in a virtual world more than you'd ever win in a real world. Thus putting notions into your head that if you played for real, how much richer you can and will become.
Not a site for the easily led and folks with no will power me thinks.