Scams are not moderated, the section was put in place after the ponzis made the rest of the gambling section useless.
Edit:
The rule(s) for a sub section are essentially "have enough threads/posts to make it a dominant topic in an existing section". E.g. blockchain.info might get a seperate section if the support posts are too much for the service discussion section.
Might "8ball of Meth and Rusty AK47 Gift Set" get a separate section if the support posts are too much for the goods section?
If not, why

...I think Investor based is a useful sub forum. ...
As useful as any ghetto, i suppose. The problem's the public face of Bitcoin is now a ghetto.
Grills are laughing.
The sub forum was made to gather all ponzi scams in one place so people know that those ''games'' there are definitely ponzi and if someone tries to promote a ponzi somewhere else the thread will get moved to the investor based games. There is no way to stop ponzies from showing up, if mods deleted them people would just promote them without telling people they are ponzies so we would actually create more scams.
For the time being, I'll overlook the likelihood of you posting just for the sake of getting a few satoshi from your 'provably fair casino' sig, and explain to you why every forum on the internet doesn't have a subforum dedicated to ponzis, illegal gambling, or selling shitty drugs, rusty AKs and child porn.
You ready?
Here we go:
Because, surprisingly, yes, yes, you can stop those things. In fact, it is
the duty of the forum operator to stop such things.
Even 4chan stops such things, why can't thermos?
I will explain you something, theymos is the owner and he can do whatever the fuck he wants and if you don't agree you can leave, no one is forcing you to stay here. Maybe other forums do not have a sub forum dedicated to ponzis BUT I'm sure they have people promoting ponzis secretly trying to make them look legit, how is the admin supposed to stop those ponzis? You can't until you know for sure it's a ponzi, instead with the sub forum, ponzi operators come clean and just by posting their site, system, there they are admiting it's a ponzi, people know the risks.