Do you really believe that a few step by step tip is gonna stop an addictive gambler to quite? I've seen cases where gamblers went as far as going to see therapists to help them resolve their gambling addictions all to no avail. I'm not saying this isn't a good step, it is, all I'm saying is that the poster sounds so pessimistic about using this program to make addictive gamblers to quite. I'm just saying that contrary to the actual intent of this project, the result might be completely different.
Something is better than nothing which is why what OP is trying to do will not help many, but will definitely help a few and that by itself is a great accomplishment if you think about it.
Also, I disagree with your opinion about op sounding pessimistic. He is just being realistic while you are the one who sounds pessimistic here.
The most important thing is the willingness to help other to overcome gambling addictions and the ops have chosen to select a few people as the project progress and there is a success ratio then he can decide to increase the number of beneficiaries and at some point also the ability to increase the number of those who may enrol in this is depending on the willingness of the gambler to quit by all means.
So with that readiness to quit, it becomes easier for them to quit with little effort, so first before the ops can take in new addicts for rehabilitation, he should first check out for those who are truly ready to quit gambling.
In order to overcome addiction, it's really crucial that there's a willingness. Because the gamblers needs to help themselves first to start the journey of changing what they used to. Those who are currently experiencing a gambling problem can find support from each other who are also going through the same situation. Anyway, the site is good for gamblers who really want to quit and wants to overcome their gambling problem. But it will only work if the gambler itself is really willing and ready to leave gambling and determine to stop on how to effectively do it.