asking you to do KYC before you buy is straight forward and an honest way . But asking for KYC after you send them your money is kinda tricky and I do not like this way of dealing, Unless it was not planned and they kinda forced to do it which is so rare, any project should be aware and prepared before they start their ICO .
Of course, the conditions for the sale of new tokens in the course of the ICO should be agreed upon before the conclusion of the agreement and the sending of their money. Therefore, any talk about the need to pass a KYC check after agreeing positions and sending money is already like fraud.
With respect to the participants in the ICO generosity campaign, the requirement to pass a KYC test is generally illegal both during and after the ICO. We do not need to pass such a test, because we are not investors in these ICO projects.