Have you checked this site? It's kinda like ataria/neopets, and it's actually pretty fun. It's starting so it doesn't have lots of members and stuff but I think is really funny, Plus,, with that few members it means that you can restock more and make cP quickly... I have like 1.2 mills and it was super easy to make them..
The fact that you can earn the currency so fast means it's probably worthless. Legit NP is worth $10 a 1mil. My guess is that $10 of that currency is 13m. =\ But if I can find buyers, maybe I'll join But I doubt I'll be able to. EDIT: After looking at the site info, I found out there are only 657 users on the entire site. And there was only 1 person online at the moment. So yeah... how can there be any structure economy with 650 people?