I don't know if one can label CTST card as a scam, though I doubt it, but looking at the history books in search of this card Revain has hosted on its Platform, CTST truly appears to have never existed. The internet doesn't seem to have any information as regards how it's operation were when it was existing. Even Crypto community forums like BitcoinTalk and Reddit doesn't have any history to speak of about the card. From some of my research, it appears that a technology associated with Chip cards for transactions was being created using a code name of CTST and no much information is provided thereafter. In summary, CTST card doesn't exist, it's company doesn't exist and it's domain website has been brought down and put up for sale