They often offer something like 100% interest per 24h (or something similar). They commonly run for quite a few weeks (or months sometimes) before "they go scam" publicly. The obvious idea how to exploit them is to invest something small at the first day, withdraw it as fast as possible and repeat just with the interests from the previous bet (and of course take some money away from every successful round).
Has anyone tried that? Have you been successful? Is this kind of gambling popular/common. Has it name?
Fist of all a scheme won't state that it's Ponzi or such . Most of the times you can even go through our previous messages, the deleted posts and for sure you will find plenty. Many people try and wrongly advertise on this place and at the same time, there is a very well know rule which states that :
If it sounds too good to be true it's a scam
This work for almost every situation , not even gaming alone. You have to understand that , you have to only use the trusted websites, if you want to try some new we sites then you can go for the ones which are getting involved in campaigns etc. But never send money to any site that make promises like that.
Plus I don't think many people here did fall for it.