95% of poniz are scam.
You think 5% of ponzis are not scams?

All ponzis are scams. New money to pay old debts.
A lot of ponzis also happen on btcjam daily.
Then you could say that all casino games are sc.am as well, what is your definition of a sc.am??
If the ponzi owner doesn't run away with the money and if he doesn't advertise the ponzi as a safe investment it looks like a gambling game to me