No matter from which region or country you are transferring the money you would need to include €100 buffer amount. The buffer is meant to cover the unexpected expenses and fees that might take place. For example, fluctuations in currency exchange rates, extra fees your bank takes for international transactions, etc..
Note: The full buffer amount will be transferred back to you with the last Blocked Account disbursement (unless some funds were already used to cover transfer fees).
By transferring the buffer together with the Blocked Amount you secure yourself and avoid the situation when unexpected fees and costs make the amount you transfer lower than the necessary amount for the creation of your Blocked Account. Thus, transferring a bit more at the very beginning can save you from the need to make a second transfer to cover up special bank/exchange fees later on.