From the point of view of stock exchanges and ICO teams, conducting a KYC check cannot be effective at all. KYC checks should be conducted to prevent the laundering of dirty money and combat the financing of terrorism. Therefore, only law enforcement agencies of states that used the information collected about them about the clients of the stock exchanges and the ICO can assess the effectiveness of such verification. I think that there are not so many cases in the world when the collected information made it possible for someone to expose in the laundering of dirty money or the financing of terrorists.