I agree that just because you get paid doe not necessarily mean something is not a ponzi (in general)It doesn't rely on new users. Like I said I have gotten paid without referring. You do not have to refer / bring new people in order to earn or get paid. You can earn and get paid on your own.Referring new users is optional. Local business here also pay for referring customers, that doesn't make them a ponzi. Does Cryptotab want more users? Of course they do. All businesses do. Businesses advertise all the time to get new customers but that doesn't make them a ponzi.