What a stupid thing to say.  This is either generating returns from legitimate activity, like NastyFans does with mining, fundraisers, etc. or it is using funds from selling new Ponzi shares to pay Ponzi recipients like Pirate did with the original Bitcoin Savings program.  If you don't know where the funds are being generated, like how Pirate kept things a secret, you are taking a risk. 

Too many idiots scream Ponzi without knowing what they're talking about.  Vod being guilty of this more than most.

It's very easy to dispute the Ponzi claim.  Where are the funds coming from to pay interest to these users?  The claim is that it's using some sort of trading algorithm.  If this is true, then it isn't a Ponzi, it is just a very stupid business model that relies on making money from free markets which is not only extremely risky, but obviously not going to provide a steady stream of returns or any guaranteed revenue. 

So this is either a Ponzi scam and the OP is lying about the revenue source, or it's a risky operation that wants other people to bankroll it so OP can profit with no risk.  I won't speculate on which it is, but I will only say that Vod can't say which it is with any certainty either.  Given that Vod has a history of making false claims, I would recommend you prove your revenue source to shut him up and be honest with people that there is no guaranteed returns here, and they're taking a massive risk with their funds.