There is definitely a downside to doing KYC for a small amount of money. Hackers or those attempting to perform scams may request such information in order to obtain the personal information of others. But KYC is definitely required to withdraw money from a legit platform. If an exchange platform cannot identify a user, there will be no way to catch the user even if he commits various irregularities. KYC means providing your personal information to others. If it's not an authentic platform, it's risky to provide your identity.