That is, all citizens of Russia will have to sell your token as it is useless for us???

It varies per IDO, and projects may choose to restrict participants from certain countries because of a region’s crypto laws or status as a region at high-risk of fraud. Each project will have different reasons for requiring KYC to ensure regulatory compliance. Polkastarter does not, however, have any direct control or mandate over a project’s KYC requirements or process. You can read all about it here: https://blog.polkastarter.com/what-goes-into-the-kyc-process-for-polkastarter-idos/

The Token is not useless, however your country is listed amongst restricted countries. This is according to laws and regulations surrounding the region