We shouldn't be using these sites if PND wants the title of "antiscam coin"
(Note: I'm not calling this site a scam and it looks like it works as described but is still a ponzi)
A scam is a way of cheating people out of money through dishonesty. The site pndponzi is makes clear the risks involved, and thus classifies as a gamble, not a scam. PND has always been about honesty, but it has never been against risk or gambling. Although I avoid gambling sites, some find them entertaining. I see no harm in this.