I did a quick look at the website and found a few guides and posts containing the symptoms of a gambling addiction, statistics, some general information, a few blog spots, and a happiness test, which is pretty vague and asks only a handful of questions, which are not enough to draw a conclusion.
In general, the website has useful information but certainly requires more tests, questionnaires, and content.
I just do not understand how a website may help you get rid of a gambling addiction. The people who are addicted to gambling, I am sure their family and friends must have asked to stop the gambling frequency. The people near the gambling addcited must have tried to stop the person from addiction but to no avail. So how come a text website will be able to help get rid of gambling addiction???
Anyways the first thing, they ask you is to have a happiness test. Has anyone given that test? I haven't tried it because it asks for an email address where they will send the result of this test and I am not comfortable given my email address on sites unknown to me.
The same way a psychology's website would help you with depression or other mental illnesses. Its purpose is to provide information on some basic guidelines to acknowledge your addiction and start receiving help, where to look, and so on. This website is unable to make you quit, just like any mental health website is not capable of treating your mental illness. You need professional help from a psychologist to stop any kind of addiction; I don't think someone is capable of managing it on their own. It's not shameful to ask for help, as long as you acknowledge the issue and proceed to receive assistance.
I'm also curious on what kind of insight the happiness text provides, but I'm not willing to put my email or bother investigating any further, the questions are pretty basic and vague, they need to be reconsidered.