Everyone that joins ICOs, bounties or airdrops might recently be receiving some emails purported to be from a project administrators informing you of that your earlier contact of the support has been escalated and you need to be a certain sum of bitcoin or ethereum in order to abade the problem otherwise, you lose your investment or earnings.
It is a scam. Beware!!!
First, you have to check if the message is legit at all, they have a telegram channel you can ask them if these are all coming from the administrator if they don't have one, then you can post it here the name of the site and the issues and people here can bring you answer if all these are right.