I very much agree with the op, in as much as creating several new threads that simply based on same type of discussion should be highly discouraged, fact remains that there are still some types of discussion that need to be stay on and refreshed from time to time, and topics on gambling addiction and one of those, it's something that the gambling community should always have in their sub conscious mind always so they don't allow themselves to be carried away when they engage in their gambling activity each time.
So yeah, a reduction is OK though. But not total scrapping, would be Ok to always have atleast one or two discussions centered on gambling addiction ongoing always on the forum.
Just my opinion and suggestion.
I think moderators are able to moderate the gambling addiction topic by locking the thread once it gets a decent reply. I also agree that topics like gambling addiction should be recurring due to the fact that gambling addiction never ceases to exist and having a gambling addiction topic every now and then is ok.
There is actually nothing much we can do about this repetitive gambling discussion threads. It seems that it is seasonal, so when it's time is past they will all fade away or be buried. However, it is a very food campaign and we should be proud of it, addicts can begin to ask themselves why the addiction topics are rampant and as such they will choose to repent.
As you noted in Op, people who wants to cure their gambling addiction may end up joint this forum and I wonder what will happen afterwards
True that, we cannot control the member to not create another gambling addiction topic because there is already an existing one. Aside from that, the topic may have variation which is possibly different from the other thread although it fall under gambling addiction.