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!!!
Every ICO has their own telegram channel, before doing anything, you must first confirm it in their telegram channel, if you are an investor you must be educated to know what is right and wrong and your communication should always open to the developer of the coin you are following.