If there are many people who like traditional gambling games and not Ponzis, then a category should probably be created, but I'm not sure where the line would be drawn between Ponzis and other games. Maybe traditional games must be based 100% on chance? But that'd eliminate many other games as well.
Besides the "scam yes or no" discussion I think that this is the situation.
There are like 7 "anti ponzi - pls make own forum" topics already and many people agree with that. I can quote them if you want, but I think it's pretty obvious for anyone who is active in the gambling forum.
I do think there is a market for ponzis but "traditional gambling" and ponzi seem 2 completely different target groups to me. Also sometimes the first page of the gambling forum is covered by more than 50% ponzi so there are also enough topics to fill an own forum too.
I think the line is very clear. At this point sub forum could be called "Ponzi/HYIP Gambling" and all topics that include "ponzi" in the title could be moved to there already. Anything with "
invest and get 120% unless you are the last" = ponzi, can be moved there. At this point it's that simple IMO.