This forum is running adds for ponzicoin.co
This is an obvious pyramid scheme that will sooner or later collapse for sure and a lot of people will loose their money.
When this happens a lot of people are going to use this as ammunition against bitcoin. Like look bitcoin scam, bitcoin pyramid, bitcoin ponzi etc endorsed by bitcointalk, that what they gonna say.
I think it is a very bad idea for bitcointalk to be running these adds
It's a ponzi scheme which admits it's a ponzi scheme.
You could technically see it as a risky form of gambling I suppose. But the potential payouts vs the risk is far too imbalanced to ever make anything like this worth it IMO.