It is not a ponzi. Ponzis rely on new members paying in to pay out existing members. No one pays anything to use Cryptotab . It does have an optional referral mlm structure, but is not by definition a ponzi. You can get paid without referring anyone and without making any type of purchase (there is nothing to buy here). I know because I have been paid when I had no referrals.. And yes it is still going and still paying. :)